Bimetallic ZIF-Based PtCuCo/NC Electrocatalyst Pt Supported with an N-Doped Porous Carbon for Oxygen Reduction Reaction in PEM Fuel Cells

Abstract

The research and synthesis of low-loading Pt-based catalysts with excellent catalytic performance and high stability are critical in achieving the commercial application of proton exchange membrane fuel cells. In this study, the Cu element is incorporated into a Co-based zeolitic imidazolate framework (ZIF) structure, and an N-doped low Pt-loading PtCuCo/NC alloy catalyst is synthesized using the impregnation reduction method with bimetallic CuCo-ZIF as a carrier. Incorporating a second metal Cu to Co-ZIF forms more metal-N bonds, increasing the N-doping content, and resulting in more structural defects. Meanwhile, the porous structure of ZIF can better disperse Pt/Pt alloy particles, which allows the generation and exposure of more oxygen reduction reaction active sites. PtCuCo/NC exhibits good catalytic activity (0.907 V) in electrochemical tests, with a high half-wave potential after 10,000 cycles and superior performance in single-cell tests. This study provides an idea for improving the performance of Pt-based fuel cell catalysts.

Engineering PtCu Alloy Nanoparticles on ZIF-8-Derived N-Doped Carbon for Enhanced Oxygen Reduction Reaction

“…Therefore, the excellent ORR catalytic activity can be partially ascribed to the high-efficiency Pt utilization. The performance of PtCu/NC is comparable with the recently reported Pt-based catalysts in different studies. − Table S2 shows higher MA and better ORR performance of PtCu/NC compared to previously reported Pt alloy catalysts. ,,,− …”

Carbon core–shell Pt nanoparticle embedded porphyrin Co-MOF derived N-doped porous carbon for the alkaline AEM water electrolyzer application

“…32,37 Also, the Co satellite peak indicates that the Co exists in the form of ions or oxides throughout the materials. 59,60 Furthermore, aer incorporating Pt nanoparticles, Co 2p binding energy was shied to the higher side (0.35 eV) for Pt@Co-NPC-800 owing to the electronegativity difference between Pt and Co. 50 Besides, the peak area of Co 2+ oxidation state is higher for Pt@Co-NPC-800 compared to Co-NPC-800 due to the integration of Pt nanoparticles along with the Co-NPC-800. 61 This evidence conrms the electronic interactions between Co and Pt@Co electrocatalysts, thus impacting the enhanced intrinsic catalytic activity of the Pt@Co heterostructure in the HER.…”

ZIF67-ZIF8@MFC-Derived Co-Zn/NC Interconnected Frameworks Combined with Perfluorosulfonic Acid Polymer as a Highly Efficient and Stable Composite Electrocatalyst for Oxygen Reduction Reactions

“…The BET-specific surface areas (SSAs) and pore-size distributions of ZIF8@MFC, ZIF67-ZIF8@MFC-X (X = 10%, 20%, 30%, 50%), ZIF67@MFC, ZIF8, and ZIF67@ZIF8 are measured via N 2 adsorption-desorption experiments ( Figure S1 ). As displayed in Figure S1a , the adsorption isotherm of ZIF67@MFC exhibits type Ⅰ isotherm characteristics with a microporous structure [ 39 ]. In contrast, ZIF8@MFC and ZIF67-ZIF8@MFC-X display a combination of type-I and type-II isotherms, indicating the coexistence of abundant microporous and macroporous structures [ 40 ].…”