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- Title
Chromium‐Doped Nickel Oxide and Nickel Nitride Mediate Selective Electrocatalytic Oxidation of Sterol Intermediates Coupled with H<sub>2</sub> Evolution.
- Authors
Li, Suiqin; Wang, Shibin; He, Jiahui; Li, Kai; Xu, Yinjie; Wang, Mengxin; Zhao, Shuying; Wang, Yuhang; Li, Xiaonian; Zhong, Xing; Wang, Jianguo
- Abstract
Replacing the oxygen evolution reaction (OER) with the thermodynamically favorable electrooxidation of organics is considered a promising approach for the simultaneous production of hydrogen (H2) and high‐value chemicals. However, exploring and optimizing efficient electrocatalysts remains a challenge for large‐scale production of value‐added steroid carbonyl and H2. Herein, Cr‐NiO/GF and Cr‐Ni3N/GF (GF: graphite felt) electrocatalysts were designed as anode and cathode for the production of steroid carbonyls and H2, respectively. The cooperative Cr‐NiO and ACT (4‐acetamido‐2,2,6,6‐tetramethyl‐1‐piperidine‐N‐oxyl) electrocatalyst can be extended to the electrooxidation of a series of steroid alcohols to the corresponding aldehydes. Additionally, Cr‐Ni3N displays superior electrocatalytic activity for hydrogen evolution reaction (HER), with a low overpotential of 35 mV to deliver 10 mA cm−2. Furthermore, the system coupled with anodic electrooxidation of sterol and cathodic HER exhibited excellent performance with high space‐time yield of 48.85 kg m−3 h−1 for steroid carbonyl and 1.82 L h−1 for H2 generation in a two‐layer stacked flow cell. Density Functional Theory (DFT) calculations indicated that Cr doping effectively stabilizes ACTH on the NiO surface, and ACTH molecule could be captured via the ketonic oxygen interaction with Cr, resulting in excellent electrocatalytic activity. This work develops a novel approach to the rational design of efficient electrocatalysts for the simultaneous production of H2 and large‐scale value‐added pharmaceutical carbonyl intermediates.
- Subjects
NICKEL oxides; HYDROGEN evolution reactions; NICKEL oxide; OXYGEN evolution reactions; ERGOSTEROL; NITRIDES; DENSITY functional theory; OXIDATION
- Publication
Angewandte Chemie, 2023, Vol 135, Issue 30, p1
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.202306553