Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in Registration Statement No. 333-132933 on Form S-8 of Duke Energy Corporation, of our report dated June 30, 2008, appearing in this Annual Report on Form 11-K of the Duke Energy Retirement Savings Plan (the “Plan”) for the year ended December 31, 2007.
| /s/ McCONNELL & JONESLLP |
| Houston, Texas |
| June 30, 2008 |