Cooperative Rh-O 5 /Ni(Fe) Site for Efficient Biomass Upgrading Coupled with H 2 Production

作者：Lingyou Zeng, Yanju Chen, Mingzi Sun, Qizheng Huang, Kaian Sun, Jingyuan Ma, Jiong Li, Hao Tan, Menggang Li, Yuan Pan, Yunqi Liu, Mingchuan Luo, Bolong Huang, Shaojun Guo · 发表于：Journal of the American Chemical Society · 年份：2023 · DOI：10.1021/jacs.3c02570 · 被引用次数：262 · 研究领域：Electrocatalysts for Energy Conversion、Catalysis for Biomass Conversion、Advanced battery technologies research

Designing efficient and durable bifunctional catalysts for 5-hydroxymethylfurfural (HMF) oxidation reaction (HMFOR) and hydrogen evolution reaction (HER) is desirable for the co-production of biomass-upgraded chemicals and sustainable hydrogen, which is limited by the competitive adsorption of hydroxyl species (OH ads ) and HMF molecules. Here, we report a class of Rh–O 5 /Ni(Fe) atomic site on nanoporous mesh-type layered double hydroxides with atomic-scale cooperative adsorption centers for highly active and stable alkaline HMFOR and HER catalysis. A low cell voltage of 1.48 V is required to achieve 100 mA cm –2 in an integrated electrolysis system along with excellent stability (>100 h). Operando infrared and X-ray absorption spectroscopic probes unveil that HMF molecules are selectively adsorbed and activated over the single-atom Rh sites and oxidized by in situ-formed electrophilic OH ads species on neighboring Ni sites. Theoretical studies further demonstrate that the strong d–d orbital coupling interactions between atomic-level Rh and surrounding Ni atoms in the special Rh–O 5 /Ni(Fe) structure can greatly facilitate surface electronic exchange-and-transfer capabilities with the adsorbates (OH ads and HMF molecules) and intermediates for efficient HMFOR and HER. We also reveal that the Fe sites in Rh–O 5 /Ni(Fe) structure can promote the electrocatalytic stability of the catalyst. Our findings provide new insights into catalyst design for complex reactions involving co...