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Ultralow-Pt Loading Strategies for Electrocatalytic Methanol Oxidation:Challenges and Opportunities 认领 引用
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作者 Lingwei Hu Jitao Li +3 位作者 Ruijie Li Yucheng Wang Haoqi Wang Shun Lu 《Transactions of Tianjin University》 EI CAS 2026年第2期151-177,共27页
Direct methanol fuel cells represent a pivotal technology for next-generation portable power sources,off ering high energy density and logistical advantages over gaseous H 2.However,their widespread commercialization ... Direct methanol fuel cells represent a pivotal technology for next-generation portable power sources,off ering high energy density and logistical advantages over gaseous H 2.However,their widespread commercialization remains heavily constrained by high cost and limited availability of Pt,the benchmark electrocatalyst for the methanol oxidation reaction.Although minimizing Pt loading is an economic imperative,it introduces a severe technical challenge:achieving high catalytic activity and long-term durability in ultralow-Pt loadings is notoriously difficult due to sluggish reaction kinetics and rapid electrode surface poisoning by CO intermediates.This review critically analyzes recent breakthroughs in ultralow-Pt loading strategies,comprehensively categorizing them into geometric nanostructuring,compositional alloying,and atomic-level engineering approaches,with particular emphasis on single-atom and sub-nanometer cluster catalysts.We provide an in-depth discussion of the fundamental mechanisms governing atom utilization efficiency and highlight the crucial role of strong metal–support interactions in stabilizing vulnerable active sites.Furthermore,we address the notable gap that persists between laboratory half-cell performance and practical implementations in membrane electrode assemblies.By integrating emerging insights from advanced operando characterization and computational modeling,this review off ers a strategic roadmap to overcome the persistent stability–activity trade-off,ultimately guiding the design of cost-eff ective,high-performance catalysts essential for a sustainable energy future. 展开更多
关键词 Direct methanol fuel cells Ultralow-platinum loading Methanol oxidation reaction Atom utilization efficiency Single-atom catalysts
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Dynamic Evolution of Copper-Based Catalysts in Electrochemical Nitrate Reduction to Ammonia 认领 引用
2
作者 Yabo Wang Gangfeng Du +3 位作者 Zhengshan Tian Zihong Pan Kesheng Cao Haoqi Wang 《化学进展》 SCIE CAS CSCD 北大核心 2026年第5期809-831,共23页
The dynamic evolution of catalysts is a crucial phenomenon in electrocatalysis,particularly in the nitrate electroreduction to ammonia(NO3RR)process.This review systematically studies the mechanisms underlying the ... The dynamic evolution of catalysts is a crucial phenomenon in electrocatalysis,particularly in the nitrate electroreduction to ammonia(NO3RR)process.This review systematically studies the mechanisms underlying the dynamic evolution of copper-based catalysts during NO3RR,emphasizing how reconstructed structures can significantly influence electrochemical performance.Achieving a designed active surface through dynamic evolution is essential for optimizing catalytic efficiency.We highlight advanced electrochemical,microscopic,and spectroscopic techniques that are instrumental in tracking these dynamic processes,providing insights into how structural changes occur in real-time.Moreover,we present a comprehensive summary of the latest strategies for regulating dynamic evolution,including valence-state control,morphological engineering,crystal facet optimization,heterogeneous interface construction,and in-situ defect engineering.These approaches effectively harness the dynamic nature of catalysts to enhance their performance in NO3RR.However,several challenges remain,such as the mechanistic ambiguity surrounding active sites,limited capabilities for in-situ monitoring,trade-offs between stability and activity,and scalability barriers.This review concludes by offering perspectives for future research,asserting that controlled dynamic evolution is pivotal for unlocking the full potential of Cu-based catalysts in the pursuit of sustainable nitrate reduction to ammonia. 展开更多
关键词 dynamic evolution nitrate reduction electrocatalysis copper catalysts
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Mechanistic Insights into Electrocatalytic Urea Oxidation Reaction Through in situ Characterizations 认领 引用
3
作者 Suzhen Bai Yi Zeng +3 位作者 Zhengshan Tian Kesheng Cao Xingwu Li Haoqi Wang 《化学进展》 SCIE CAS CSCD 北大核心 2025年第12期1769-1791,共23页
The electrocatalytic urea oxidation reaction(UOR)has emerged as an energy-efficient alternative to the traditional oxygen evolution reaction for hydrogen production,with mechanistic understanding being critical for th... The electrocatalytic urea oxidation reaction(UOR)has emerged as an energy-efficient alternative to the traditional oxygen evolution reaction for hydrogen production,with mechanistic understanding being critical for the rational design of catalysts.This review systematically summarizes recent advances in in situ characterization techniques for elucidating the dynamic reaction mechanisms of UOR.Studies reveal that phase transitions,valence state migration,and electronic structure evolution of catalysts under operational conditions are key factors governing activity and stability.Techniques such as in situ X-ray diffraction,X-ray absorption spectroscopy,Raman spectroscopy,and Fourier-transform infrared spectroscopy enable real-time monitoring of catalyst reconstruction,intermediate evolution,and interfacial adsorption behavior,overcoming the environmental deviations inherent in conventional ex situ characterization.When combined with theoretical calculations,these methods provide direct evidence for identifying active-site configurations,reaction pathways,and rate-determining steps.In addition,special emphasis is placed on multimodal in situ strategies for deciphering synergistic effects in nickel-based catalysts,while current challenges,including non-alkaline systems,real wastewater environments,and multi-metal cooperation mechanisms,are critically discussed.Future research should focus on developing novel in situ approaches for complex systems and establishing a mutually reinforcing framework integrating theoretical prediction and experimental validation,thereby advancing UOR catalyst design from empirical exploration to mechanism-guided optimization. 展开更多
关键词 urea oxidation reaction mechanistic insight in-situ characterizations active sites dynamic evolution
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