Boron‐Intercalation‐Induced Phase Evolution of Rh Metallene for Energy‐Saving H<sub>2</sub> Production by H<sub>2</sub>O<sub>2</sub> Oxidation Coupled with Water Electrolysis
Kai Deng, Wenxin Wang, Qiqi Mao, Hongjie Yu, Ziqiang Wang, You Xu, Xiao‐Nian Li, Hongjing Wang, Liang Wang
Abstract
Abstract Tailoring the morphology and crystal structure of metallene is critical to improve its electrocatalytic performance. In this work, hetero‐phase RhB metallene ( h ‐RhB metallene) with amorphous/crystalline structure is readily prepared by a two‐step method. The h ‐RhB metallene is very unique in its non‐metallic heteroatom doping and amorphous/crystalline structure. Benefiting from the unique metallene structure and the optimized electronic states induced by the incorporation of B atoms, the h ‐RhB metallene exhibits superior performance for hydrogen evolution reaction and hydrogen peroxide electro‐oxidation reaction (HPOR). When coupled with HPOR, the h ‐RhB metallene|| h ‐RhB metallene water electrolysis two‐electrode system exhibits a lower cell voltage of 0.379 V (@ 10 mA cm −2 ) compared with the overall water splitting (1.35 V). The presented synthetic method provides a powerful strategy to design metallene with hetero‐phase for energy‐saving H 2 production.