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Constructing self-supported Pt/MoO2 on molybdenum mesh for a highly efficient hydrogen evolution reaction
Inorganic Chemistry Frontiers ( IF 7 ) Pub Date : 2024-05-08 , DOI: 10.1039/d4qi00834k
Jin Li 1 , Panpan Zhang 1 , Yunli Yang 1 , Jian Zhang 2 , Meisa Zhou 3 , Heng Zhang 4 , Guilong Liu 1 , Naiteng Wu 1 , Changzhou Yuan 5 , Xianming Liu 1
Affiliation  

It is an effective strategy to enhance platinum (Pt) utilization and lower the catalyst cost by loading Pt on a self-supported electrode. In this work, we employ a molybdenum (Mo) mesh both as the source of Mo and the self-supported electrode. Through a successful combination of the spray and calcination methods, Pt is efficiently loaded onto the self-supported molybdenum dioxide (MoO2) electrode, achieving a Pt loading content of only ∼0.67 wt%. Simultaneously, three-dimensional (3D) MoO2 exhibits a structure comprised of nanosheets, each possessing perforations. As expected, the prepared electrocatalyst demonstrates exceptional performance, manifesting an overpotential of 26.8 mV at −10 mA cm−2, a Tafel slope of 59.2 mV dec−1, and a noteworthy durability of over 240 hours. Both experimental studies and theoretical calculations affirm that the catalyst's outstanding performance stems from the strong interaction between Pt and MoO2, the distinctive structure of MoO2 with perforated nanosheets, and the self-supporting characteristics of the electrode. This work introduces an efficient method for constructing self-supporting heterojunctions, thereby advancing the development of electrocatalytic hydrogen evolution.

中文翻译:


在钼网上构建自支撑 Pt/MoO2 以实现高效析氢反应



通过在自支撑电极上负载Pt是提高铂(Pt)利用率并降低催化剂成本的有效策略。在这项工作中,我们采用钼 (Mo) 网作为 Mo 源和自支撑电极。通过喷雾和煅烧方法的成功结合,Pt被有效负载到自支撑二氧化钼(MoO 2 )电极上,实现了仅~0.67 wt%的Pt负载量。同时,三维 (3D) MoO 2 呈现出由纳米片组成的结构,每个纳米片都具有穿孔。正如预期的那样,所制备的电催化剂表现出卓越的性能,在 -10 mA cm −2 下表现出 26.8 mV 的过电位,59.2 mV dec −1 的塔菲尔斜率,以及超过240小时。实验研究和理论计算均证实该催化剂的优异性能源于Pt和MoO 2 之间的强相互作用、MoO 2 具有穿孔纳米片的独特结构以及自支撑电极的特性。这项工作介绍了一种构建自支撑异质结的有效方法,从而推动了电催化析氢的发展。
更新日期:2024-05-08
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