Exhibit 10.1 Promissory Note dated August 25, 2021

Exhibit 10.1

PROMISSORY NOTE

FOR VALUE RECEIVED, VOLT H2 HOLDINGS AG, a Swiss corporation (the “Borrower”) hereby unconditionally promises to pay to the order of Vision Hydrogen Corporation, a Nevada corporation (the “Noteholder”), the principal amount of $500,000.00 (ONE HUNDRED THOUSAND DOLLARS) (the “Loan”), as provided in this Promissory Note (this “Note”).

1. Payment Dates.

(a) Payment Date. The aggregate unpaid principal amount of the Loan shall be due and payable on November 1, 2021.

(b) Prepayment. The Borrower may prepay the Loan in whole or in part at any time or from time to time without penalty or premium by paying the principal amount to be prepaid.

2. Interest. Principal amounts outstanding under this Note shall not bear interest.

3. Payment Mechanics.

(a) Manner of Payment. All payments of principal shall be made in US dollars no later than 12:00 PM Eastern time on the date on which such payment is due. Such payments shall be made by wire transfer of immediately available funds to the Noteholder’s account at a bank specified by the Noteholder in writing to the Borrower from time to time.

(b) Business Day. Whenever any payment hereunder is due on a day that is not a Business Day, such payment shall be made on the next succeeding Business Day. “Business Day” means a day other than Saturday, Sunday, or other day on which commercial banks in New York, NY are authorized or required by law to close.

(c) Evidence of Debt. The Borrower authorizes the Noteholder to record on the grid attached as Exhibit A the Loan made to the Borrower and the date and amount of each payment or prepayment of the Loan. The entries made by the Noteholder shall be prima facie evidence of the existence and amount of the obligations of the Borrower recorded therein in the absence of manifest error. No failure to make any such record, nor any errors in making any such records, shall affect the validity of the Borrower’s obligation to repay the unpaid principal of the Loan in accordance with the terms of this Note.

4. Representations and Warranties. The Borrower represents and warrants to the Noteholder as follows:

(a) Existence. The Borrower is a corporation duly incorporated, validly existing, and in good standing under the laws of the state of its organization. The Borrower has the requisite power and authority to own, lease, and operate its property, and to carry on its business.

(b) Compliance with Law. The Borrower is in compliance with all laws, statutes, ordinances, rules, and regulations applicable to or binding on the Borrower, its property, and business.

(c) Power and Authority. The Borrower has the requisite power and authority to execute, deliver, and perform its obligations under this Note.

(d) Authorization; Execution and Delivery. The execution and delivery of this Note by the Borrower and the performance of its obligations hereunder have been duly authorized by all necessary corporate action in accordance with applicable law. The Borrower has duly executed and delivered this Note.

5. Events of Default. The occurrence and continuance of any of the following shall constitute an “Event of Default” hereunder:

(a) Failure to Pay. The Borrower fails to pay any principal amount of the Loan when due.

(b) Breach of Representations and Warranties. Any representation or warranty made by the Borrower to the Noteholder herein contains an untrue or misleading statement of a material fact as of the date made.

(c) Bankruptcy; Insolvency.

(i) The Borrower institutes a voluntary case seeking relief under any law relating to bankruptcy, insolvency, reorganization, or other relief for debtors, or equivalent thereof under applicable law.

(ii) An involuntary case is commenced seeking the liquidation or reorganization of the Borrower under any law relating to bankruptcy or insolvency, and such case is not dismissed or vacated within 60 days of its filing.

(iii) The Borrower makes a general assignment for the benefit of its creditors.

(iv) The Borrower is unable, or admits in writing its inability, to pay its debts as they become due.

(v) A case is commenced against the Borrower or its assets seeking attachment, execution, or similar process against all or a substantial part of its assets, and such case is not dismissed or vacated within 60 days of its filing.

(d) Failure to Give Notice. The Borrower fails to give the notice of Event of Default specified in 6.

6. Notice of Event of Default. As soon as possible after it becomes aware that an Event of Default has occurred, and in any event within two (2) Business Days, the Borrower shall notify the Noteholder in writing of the nature and extent of such Event of Default and the action, if any, it has taken or proposes to take with respect to such Event of Default.

7. Remedies. Upon the occurrence and during the continuance of an Event of Default, the Noteholder may, at its option, by written notice to the Borrower declare the outstanding principal amount of the Loan, and all other amounts payable hereunder immediately due and payable; provided, however, if an Event of Default described in Sections 5(c)(i), 5(c)(iii), or 5(c)(iv) shall occur, the outstanding principal amount, and all other amounts payable hereunder shall become immediately due and payable without notice, declaration, or other act on the part of the Noteholder.

8. Expenses. The Borrower shall reimburse the Noteholder on demand for all reasonable out-of-pocket costs, expenses, and fees, including the reasonable fees and expenses of counsel, incurred by the Noteholder in connection with the enforcement of the Noteholder’s rights hereunder.

9. Notices. All notices and other communications relating to this Note shall be in writing and shall be deemed given upon the first to occur of (x) deposit with the United States Postal Service or overnight courier service, properly addressed and postage prepaid; (y) transmittal by facsimile or e-mail properly addressed (with written acknowledgment from the intended recipient such as “return receipt requested” function, return e-mail, or other written acknowledgment); or (z) actual receipt by an employee or agent of the other party. Notices hereunder shall be sent to the following addresses, or to such other address as such party shall specify in writing:

10. Governing Law. This Note and any claim, controversy, dispute, or cause of action (whether in contract, tort, or otherwise) based on, arising out of, or relating to this Note and the transactions contemplated hereby shall be governed by and construed in accordance with the laws of the State of New York.

11. Disputes.

(a) Submission to Jurisdiction.

(i) The Borrower irrevocably and unconditionally (A) agrees that any action, suit, or proceeding arising from or relating to this Note may be brought in the courts of the State of New York sitting in New York County, and in the United States District Court for the Southern District of New York, and (B) submits to the exclusive jurisdiction of such courts in any such action, suit, or proceeding. Final judgment against the Borrower in any such action, suit, or proceeding shall be conclusive and may be enforced in other jurisdictions by suit on the judgment or in any other manner provided by law.

(ii) Nothing in this Section 11(a) shall affect the right of the Noteholder to bring any action, suit, or proceeding relating to this Note against the Borrower or its properties in the courts of any other jurisdiction.

(iii) Nothing in this Section 11(a) shall affect the right of the Noteholder to serve process upon the Borrower in any manner authorized by the laws of any such jurisdiction.

(b) Venue. The Borrower irrevocably and unconditionally waives, to the fullest extent permitted by law, (i) any objection that it may now or hereafter have to the laying of venue in any action, suit, or proceeding relating to this Note in any court referred to in Section 11(a), and (ii) the defense of inconvenient forum to the maintenance of such action, suit, or proceeding in any such court.

(c) Waiver of Jury Trial. THE BORROWER HEREBY IRREVOCABLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY IN ANY LEGAL PROCEEDING DIRECTLY OR INDIRECTLY RELATING TO THIS NOTE OR THE TRANSACTIONS CONTEMPLATED HEREBY, WHETHER BASED ON CONTRACT, TORT, OR ANY OTHER THEORY.

12. Successors and Assigns. This Note may be assigned or transferred by the Noteholder to any individual, corporation, company, limited liability company, trust, joint venture, association, partnership, unincorporated organization, governmental authority, or other entity.

13. Integration. This Note constitutes the entire contract between the Borrower and the Noteholder with respect to the subject matter hereof and supersedes all previous agreements and understandings, oral or written, with respect thereto.

14. Amendments and Waivers. No term of this Note may be waived, modified, or amended, except by an instrument in writing signed by the Borrower and the Noteholder. Any waiver of the terms hereof shall be effective only in the specific instance and for the specific purpose given.

15. No Waiver; Cumulative Remedies. No failure by the Noteholder to exercise and no delay in exercising any right, remedy, or power hereunder shall operate as a waiver thereof; nor shall any single or partial exercise of any right, remedy, or power hereunder preclude any other or further exercise thereof or the exercise of any other right, remedy, or power. The rights, remedies, and powers herein provided are cumulative and not exclusive of any other rights, remedies, or powers provided by law.

16. Severability. If any term or provision of this Note is invalid, illegal, or unenforceable in any jurisdiction, such invalidity, illegality, or unenforceability shall not affect any other term or provision of this Note or render such term or provision invalid or unenforceable in any other jurisdiction.

IN WITNESS WHEREOF, the Borrower has executed this Note as of August 25, 2021.

EXHIBIT a

PAYMENTS ON THE LOAN