Scalable Synthesis of Pt Nanoflowers on Solution‐Processed MoS2 Thin Film for Efficient Hydrogen Evolution Reaction

• DOI: 10.1002/smsc.202200043
• Publication Date: 2022-08-03T02:59:05Z
• Authors: Yun Seong Cho; Dongjoon Rhee; Jeongha Eom; Jihyun Kim; Myeongjin Jung; Youngdoo Son; Young-Kyu Han; Ki Kang Kim; Joohoon Kang
• Keywords: Nanomaterial-based catalyst; Platinum nanoparticles

Nanostructuring of Pt nanocatalysts increases the surface‐to‐volume ratio, thus enabling efficient usage for hydrogen evolution reaction (HER). Direct electrochemical reduction on electrode can produce nanostructured catalysts, which has been time‐consuming conventional colloidal synthesis. However, carbon‐based growth templates commonly used to create nanoparticles offer limited control over morphologies and HER performance. Herein, a facile synthesis nanoflowers (NFs) with well‐defined petals is presented. Semiconducting MoS 2 nanosheets are solution processed into film carbon paper (CP) synthesize NFs upon precursor. The show higher activities than spherical or spiky because their larger active surface area enable faster release bubbles during HER. By generating sulfur vacancies MoO x template using reactive ion etching, areal density spatial uniformity be greatly enhanced mass activity achieved more 10 times as high that Pt/C electrode. Multiple electrodes nearly similar properties repeatedly produced by single precursor solution, highlights cost‐efficiency scalability our strategy.