Introducing Rh-doped Mg(OH)2 on Ni-MOF as a symmetry electrode for accelerating urea oxidation reaction assisted hydrogen evolution

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL Journal of the Taiwan Institute of Chemical Engineers Pub Date : 2025-07-01 Epub Date: 2025-04-13 DOI:10.1016/j.jtice.2025.106138

Zhenyu Wang , Yiming Wang , Cengceng Du , Yi Liu , Shengyin Luo , Xin Chen , Wenlong Zhang , Xinyu Liu , Wenjuan Xu , Peng Zheng , Sun Hong-bin , Guangwen Xu

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Abstract

Background

Urea oxidation reaction (UOR) assisted H₂ evolution reaction (HER) holds promising for energy-saving H₂ production via the water electrolysis.

Methods

In this work, an alkaline earth metal species, Mg(OH)₂, is applied to activate the catalytic performance of the Rh-based catalyst. The developed catalyst Rh-doped Mg(OH)₂ on Ni-MOF/NF has both excellent UOR and HER catalytic activities. Evidence is supported by experiments and calculations that the Rh/Mg(OH)₂ is the active site.

Significant findings

In a alkaline environment, the overpotential of HER is only 14 mV to 10 mA cm^-2 of the current density, and anodic potential of UOR is only 1.290 V. When assembling a symmetry electrolyzer, UOR assisted HER can save 200 mV compared to water electrolysis.

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在Ni-MOF上引入掺铑Mg(OH)2作为加速尿素氧化反应的对称电极，辅助析氢

durea氧化反应（UOR）辅助析氢反应（HER）在水电解法节能制氢方面具有广阔的前景。方法采用碱土金属Mg(OH)2来激活rh基催化剂的催化性能。所研制的Ni-MOF/NF上掺铑的Mg(OH)2催化剂具有优异的UOR和HER催化活性。实验和计算证明，Rh/Mg(OH)2是活性位点。在碱性环境下，HER的过电位仅为电流密度的14 mV ~ 10 mA cm-2， UOR的阳极电位仅为1.290 V。在组装对称电解槽时，与水电解相比，UOR辅助HER可节省200mv。

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来源期刊

Journal of the Taiwan Institute of Chemical Engineers 工程技术-工程：化工

CiteScore

9.10

自引率

14.00%

发文量

362

审稿时长

35 days

期刊介绍： Journal of the Taiwan Institute of Chemical Engineers (formerly known as Journal of the Chinese Institute of Chemical Engineers) publishes original works, from fundamental principles to practical applications, in the broad field of chemical engineering with special focus on three aspects: Chemical and Biomolecular Science and Technology, Energy and Environmental Science and Technology, and Materials Science and Technology. Authors should choose for their manuscript an appropriate aspect section and a few related classifications when submitting to the journal online.