Surface engineering in improving activity of Pt nanocubes for ammonia electrooxidation reaction

Siddharth, Kumar; Hong, Yang; Qin, Xueping; Lee, Hye Jin; Chan, Yat Tung; Zhu, Shangqian; Chen, Guohua; Choi, Sang‐Il; Shao, Minhua

doi:10.1016/j.apcatb.2020.118821

Cited by 60 publications

(36 citation statements)

References 57 publications

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“…Ammonia is an important raw material in the chemical industry and agriculture 1 . Meanwhile, ammonia also acts as an important carbon‐free energy carrier because of its high hydrogen content of 17.6% 2,3 . Due to its wide applications, the annual global demand for the production of ammonia is about 200 million tons, 4 which is expected to increase in the near future due to the booming population as well as the search for new energy conversion and storage strategies.…”

Section: Introductionmentioning

confidence: 99%

Engineering of electrocatalyst/electrolyte interface for ambient ammonia synthesis

Xing

Zhang

et al. 2021

SusMat

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Ammonia is not only an important platform chemical for industrial and agricultural use but is also a novel energy‐carrying molecule. The electrochemical reduction method for ambient ammonia synthesis is emerging as a promising strategy for the replacement of the current Haber–Bosch ammonia synthesis method, which consumes a large amount of energy and natural gas (hydrogen resource) while releasing substantial greenhouse gases (eg, carbon dioxide). The challenges in electrochemical ammonia synthesis, also known as nitrogen reduction reaction, primarily include the cleavage of extremely stable N≡N bonds and the competitive hydrogen evolution reaction in routine aqueous media, which significantly leads to a low production rate and Faradaic efficiency. The rational design and engineering of the electrocatalyst/electrolyte interface are crucial to address these challenges. Herein, recent achievements for catalyst/electrolyte interface engineering are reviewed to provide insights into enhancing the production rate and Faradaic efficiency. Perspectives on future research and development of the electrochemical ammonia synthesis from theory to practice will be provided.

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Section: Introductionmentioning

confidence: 99%

Engineering of electrocatalyst/electrolyte interface for ambient ammonia synthesis

Xing

Zhang

et al. 2021

SusMat

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“…In Shao's report, Ir-decorated Pt nanocubes display more than twice the specific activity of pure Pt nanocubes. 240 In the condition of 0.1 M KOH and 0.1 M NH 3 , both Ir-decorated Pt nanocubes and pure Pt nanocubes deliver a characteristic NH 3 oxidation peak in the range of 0.75-0.82 V versus RHE. The specific activity of Ir-decorated Pt nanocubes is 1.25 mA cm À2 while pure Pt nanocubes are 0.58 mA cm À2 .…”

Section: Nh 3 Oxygen Reactionmentioning

confidence: 96%

mentioning

confidence: 99%

Iridium‐based electrocatalysts toward sustainable energy conversion

Huang

Zhao

2022

EcoMat

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Electrocatalysis is an important branch in electrochemistry and also has a significant position in energy storage/conversion. Iridium (Ir)-based electrocatalysts show promise because of the inherent redox property. Considering the abundance and expensive cost of such noble metal, significant efforts have been made to rationally improve the electrochemical performance of Ir-based electrocatalysts during these years from the viewpoints of structural design and kinetic analysis. Most of the reports may aim to achieve high Ir atomic utilization with more exposed active sites, and both high electrochemical activity and durable stability are expected. In this case, Ir-based single atoms, nanostructures, and composites are reported with various electrocatalytic applications of water splitting (involving hydrogen evolution and oxygen evolution reaction) and other electrocatalytic oxidation reactions (involving hydrogen oxidation reaction, methanol oxidation reaction, ammonia oxidation reaction, and formic acid oxidation reaction) as well as other electrocatalytic reduction reactions (involving oxygen reduction reaction, carbon dioxide reduction reaction, and nitrogen reduction reaction). These works deserve to be discussed and this review article comprehensively summarized the most significant reports. We analyzed Ir-based electrocatalysts from the viewpoints of synthesis, structure, electrochemical property, and reaction mechanism. The challenges and outlooks in the future were also provided from the aspects of fundamental studies and industrial applications, which may attract more attention and provide new insight into the design of advanced Ir-based electrocatalysts with high performance.

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“…With the increasing development of Pt-based catalysts, in-depth basic and applied research has been focused on both surface and nanoscale systems ( Bu et al, 2016b ; Luo et al, 2018b ). The main challenge is related to the possibility of synthesizing the unique surface structure of Pt-based materials ( Zhao et al, 2019 ; Siddharth et al, 2020 ). A typical example is the formation of an order surface layer of Pt (111) skin by thermodynamically driven segregation of Pt from PtNi alloys via thermal annealing ( Stamenkovic et al, 2007 ).…”

Section: Important Effects For Tuning Orr Performancementioning

confidence: 99%

Atomic-Scale Design of High-Performance Pt-Based Electrocatalysts for Oxygen Reduction Reaction

Ying

2021

Front. Chem.

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Fuel cells are regarded as one of the most promising energy conversion devices because of their high energy density and zero emission. Development of high-performance Pt-based electrocatalysts for the oxygen reduction reaction (ORR) is vital to the commercial application of these fuel cell devices. Herein, we review the most significant breakthroughs in the development of high-performance Pt-based ORR electrocatalysts in the past decade. Novel and preferred nanostructures, including biaxially strained core–shell nanoplates, ultrafine jagged nanowires, nanocages with subnanometer-thick walls and nanoframes with three-dimensional surfaces, for excellent performance in ORR are emphasized. Important effects of strain, particle proximity, and surface morphology are fully discussed. The remaining changes and prospective research directions are also proposed.

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Surface engineering in improving activity of Pt nanocubes for ammonia electrooxidation reaction

Cited by 60 publications

References 57 publications

Engineering of electrocatalyst/electrolyte interface for ambient ammonia synthesis

Engineering of electrocatalyst/electrolyte interface for ambient ammonia synthesis

Iridium‐based electrocatalysts toward sustainable energy conversion

Atomic-Scale Design of High-Performance Pt-Based Electrocatalysts for Oxygen Reduction Reaction

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