Authors
Jiankang Liu, Hengan Wang, Zhonghua Wu, Zongren Song, Zhongnan Ling, Shuming Zhou, Shiju Yu, Mingxin Gao, Yanjia Wang, Xiaoxue Ma, Dawei Fang, Xueqing Xing, Xinchen Kang, Buxing Han
Published in
Angewandte Chemie (International ed. in English). Pages e2390339. Oct 09, 2026. Epub Oct 09, 2026.
Abstract
Direct electrochemical C-N coupling of abundant carbon and nitrogen feedstocks offers a sustainable route to glycine synthesis, yet achieving high efficiency remains challenging. Here, we develop an In-Bi catalyst by incorporating oxophilic indium (In) into a bismuth (Bi) matrix. During the co-reduction of oxalic acid and NO3 -, the In-Bi catalyst delivers an exceptional Faradaic efficiency toward glycine (FEGlycine) of 83.3% with an industrial-level current density of 361.3 mA cm-2, together with a glycine production rate of 4.3 mol h-1 gcat. -1. It outperforms pristine Bi and previously reported state-of-the-art catalysts. Large-scale glycine electrosynthesis is further demonstrated over a 10 cm2 In-Bi electrode, achieving a total current of 1.5 A with FEGlycine of 68.5% and yielding 1.4 g of glycine in 6 h. Mechanistically, oxalic acid and NO3 - first form glyoxylic acid oxime (GAO). Subsequently, In sites act as an "active hydrogen pump" to accelerate H2O dissociation, providing abundant surface-active hydrogen (*H) for efficient GAO hydrogenation to glycine. Meanwhile, the incorporation of In modulates the electronic structure of the Bi matrix, enhancing GAO adsorption and electron transfer. The synergistic regulation of *H supply and electronic structure accelerates the conversion of GAO to glycine, resulting in superior performance of In-Bi.
PMID:
42855811
Bibliographic data and abstract were imported from PubMed on 10 Oct 2026.
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