Li Xuanyin, Fang Dong, Yi Jianhong, Zhang Lang, Liu Jian, Liu Feng
Advanced Power Materials Innovation Team, Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, P. R. China.
Yunnan Precious Metals Lab Co., Ltd., Kunming, Yunnan 650106, P. R. China.
Dalton Trans. 2024 Nov 26;53(46):18549-18559. doi: 10.1039/d4dt02600d.
Developing an efficient and stable catalyst is both attractive and challenging for the electrochemical hydrogen evolution reaction (HER) due to the aggravation under the operating environment. MXene (TiCT) is a potential catalyst support because of its abundant surface functional groups and unique hydrophilicity. However, anchoring noble metals onto MXene to construct high-performance electrocatalysts still presents some challenges. Herein, we present an MXene nanoparticle-supported Ru nanocluster (Ru@MXene-NP) electrocatalyst for HER. The Ru@MXene-NP not only effectively prohibits self-stacking but also ensures the full exposure of Ru nanoclusters. Thus, the Ru@MXene-NP catalyst exhibits an overpotential of 38.4 mV at 10 mA cm and a Tafel slope of 26.4 mV dec in an acidic medium, showcasing superior performance compared to most previously reported MXene-based catalysts. The small Tafel slope and low charge transfer resistance ( = 0.39 Ω) value indicate its fast electron transfer behavior. In addition, cyclic voltammetry curves and chronoamperometry tests demonstrate the high stability of Ru@MXene-NP. This work offers a novel perspective for designing catalysts by supporting noble metal nanoclusters on the MXene substrate's surface.
由于在操作环境下情况会恶化，开发一种高效且稳定的催化剂对于电化学析氢反应（HER）而言既具有吸引力又具有挑战性。MXene（TiCT）因其丰富的表面官能团和独特的亲水性而成为一种潜在的催化剂载体。然而，将贵金属锚定在MXene上以构建高性能电催化剂仍然存在一些挑战。在此，我们展示了一种用于HER的MXene纳米颗粒负载的Ru纳米团簇（Ru@MXene-NP）电催化剂。Ru@MXene-NP不仅有效地阻止了自堆叠，还确保了Ru纳米团簇的充分暴露。因此，Ru@MXene-NP催化剂在酸性介质中，在10 mA cm时的过电位为38.4 mV，塔菲尔斜率为26.4 mV dec，与大多数先前报道的基于MXene的催化剂相比，表现出优异的性能。较小的塔菲尔斜率和较低的电荷转移电阻（ = 0.39 Ω）值表明其快速的电子转移行为。此外，循环伏安曲线和计时电流测试证明了Ru@MXene-NP的高稳定性。这项工作为通过在MXene基底表面负载贵金属纳米团簇来设计催化剂提供了一个新的视角。
