Interfacial Bridge Bonds Induced Strong Electronic Coupling of Co@V‐WO<sub>x</sub> Catalyst for Enhanced Concurrent Co‐Electrolysis Performance
Yilin Wu, Zhangjing Yu, Yun Tong, Cong Lin, Nan Zhang, Pengzuo Chen
Abstract
Abstract The integration of the hydrogen evolution reaction (HER) with the glycerol oxidation reaction (GOR) presents a promising strategy for hydrogen production with high‐value chemicals. Herein, a strongly electronically coupled Co@V‐WO x material is presented with an amorphous nanosheet morphology, synthesized via a one‐step electrodeposition method. Experimental and theoretical investigations reveal that V doping induces robust electronic interactions between Co and the V‐WO x host through the formation of Co─O─V/W interfacial bridge bonds, enhancing electron transfer capability for superior activity. As a result, the Co@V‐WO x catalyst achieves an exceptionally low potential of −102 mV and 1.32 V at 100 mA cm⁻ 2 , along with a remarkable Faradaic efficiency of 95.4% for formate production at 1.40 V. A two‐electrode electrolyzer based on Co@V‐WO x demonstrates ≈100% Faradaic efficiency for hydrogen evolution, a Faradaic efficiency exceeding 92.8% and a production rate of 59.4 mg h⁻¹ cm⁻ 2 for formate, as well as outstanding stability over 300 h at 100 mA cm⁻ 2 , surpassing those previously reported Co‐based electrocatalysts. The in situ spectroscopic analyses and theoretical simulations further confirm that Co@V‐WO x facilitates superior reaction kinetics by promoting the formation of active species and key reaction intermediates while lowering reaction energy barriers for electrolysis.