Loh Jian Yiing, Yap Feng Ming, Siang Tan Ji, Zeng Xianhai, Ong Wee-Jun
School of Energy and Chemical Engineering, Xiamen University Malaysia, Selangor Darul Ehsan, Sepang, 43900, Malaysia.
Center of Excellence for NaNo Energy & Catalysis Technology (CONNECT), Xiamen University Malaysia, Selangor Darul Ehsan, Sepang, 43900, Malaysia.
Small. 2025 Jun;21(24):e2409331. doi: 10.1002/smll.202409331. Epub 2024 Dec 11.
Developing bifunctional electrocatalysts from earth-abundant first-row transition metals for large-scale hydrogen production through water electrolysis is both promising and challenging. This study presents a ternary layered double hydroxide (LDH) as a bifunctional electrocatalyst for the hydrogen evolution reaction (HER) and benzyl alcohol oxidation (BAOR). The synergy between 2D NiFeCo LDH and non-Ti-based NbCT MXene enhances electrochemical performance. The electrocatalyst achieves excellent results with a low potential of 1.5 V versus RHE at 100 mA cm⁻ for BAOR, an overpotential of 320 mV at 50 mA cm⁻ for HER, and stability over 100 h. A solar cell-powered HER||BAOR system shows faradaic efficiency of ≈73.92% for benzaldehyde production and solar-to-hydrogen (STH) efficiency of ≈39.67%. In situ Raman analysis identifies the oxyhydroxide group as the real catalytic active site during BAOR. These findings offer valuable insights for linking fundamental research with technological innovation to address global challenges.
利用地球上储量丰富的第一排过渡金属开发用于通过水电解大规模制氢的双功能电催化剂既充满希望又具有挑战性。本研究提出了一种三元层状双氢氧化物（LDH）作为析氢反应（HER）和苯甲醇氧化（BAOR）的双功能电催化剂。二维NiFeCo LDH与非钛基NbCT MXene之间的协同作用提高了电化学性能。该电催化剂在BAOR中，相对于可逆氢电极（RHE）在100 mA cm⁻时低电位为1.5 V，在HER中，在50 mA cm⁻时过电位为320 mV，并具有超过100小时的稳定性，取得了优异的结果。一个由太阳能电池驱动的HER||BAOR系统在苯甲醛生产方面显示出约73.92%的法拉第效率和约39.67%的太阳能制氢（STH）效率。原位拉曼分析确定了羟基氧化物基团是BAOR过程中的真正催化活性位点。这些发现为将基础研究与技术创新联系起来以应对全球挑战提供了有价值的见解。
