Atomically dispersed platinum supported onto nanoneedle-shaped protonated polyaniline for efficient hydrogen production in acidic water electrolysis

Wu, Zhenzhong; Bai, Jing; Lai, Feili; Zheng, Hui; Zhang, Yizhe; Zhang, Nan; Wang, Chuanxi; Wang, Zhenyu; Zhang, Longsheng; Liu, Tianxi

doi:10.1007/s40843-022-2414-2

Cited by 16 publications

(3 citation statements)

References 60 publications

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“…Recently, fundamental changes in the electronic and catalytic properties of the metal have been reported as precious metal or transition metal catalysts decrease from volume to nanoparticle to single atomic size. Owing to the single metal active centers, the single atom catalysts (SACs) have been used for various energy conversion catalytic reactions due to their high activity and selectivity toward specific products [39][40][41]. Owing to the isolated single atoms as catalytic centers, the SACs can potentially suppress the N-N coupling and inhibit the introduction of double-nitrogen by-product, thus promoting the selectivity of NH 3 synthesis [42,43].…”

Section: Introductionmentioning

confidence: 99%

Single‐atom catalysts for electrocatalytic nitrate reduction into ammonia

Chao,

Wang,

Zong

et al. 2024

Nanotechnology

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Ammonia (NH3) is a versatile and important compound with a wide range of uses, which is currently produced through the demanding Haber-Bosch process. Electrocatalytic nitrate reduction into ammonia (NRA) has recently emerged as a sustainable approach for NH3 synthesis under ambient conditions. However, the NRA catalysis is a complex multistep electrochemical process with competitive hydrogen evolution reaction that usually results in poor selectivity and low yield rate for NH3 synthesis. With maximum atom utilization and well-defined catalytic sites, single atom catalysts (SACs) display high activity, selectivity and stability toward various catalytic reactions. Very recently, a number of SACs have been developed as promising NRA electrocatalysts, but systematical discussion about the key factors that affect their NRA performance is not yet to be summarized to date. This review focuses on the latest breakthroughs of SACs toward NRA catalysis, including catalyst preparation, catalyst characterization and theoretical insights. Moreover, the challenges and opportunities for improving the NRA performance of SACs are discussed, with an aim to achieve further advancement in developing high-performance SACs for efficient NH3 synthesis.

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Section: Introductionmentioning

confidence: 99%

Single‐atom catalysts for electrocatalytic nitrate reduction into ammonia

Chao,

Wang,

Zong

et al. 2024

Nanotechnology

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“…Hydrogen energy, a good prospect as an alternative to fossil fuels, is extensively used in energy conversion, chemical industry, and other fields. 1,2 Water electrolysis can utilize the electrical energy to convert H 2 O into H 2 and O 2 , which is considered one of the most arousing systems for efficient hydrogen production. 3,4 Oxygen evolution reaction (OER) is essential for the efficient water electrolysis to produce hydrogen, which necessitates a four-electron proton transfer with complicated intermediates and sluggish kinetics.…”

Section: Introductionmentioning

confidence: 99%

Atomically Dispersed Iridium on Polyimide Support for Acidic Oxygen Evolution

Zhang,

Bai,

Zhang

et al. 2024

ACS Nano

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Designing a high-performing iridium (Ir) single-atom catalyst is desired for acidic water electrolysis, which shows enormous potential given its high catalytic activity toward acidic oxygen evolution reaction (OER) with minimum usage of precious Ir metal. However, it still remains a substantial challenge to stabilize the Ir single atoms during the OER operation without sacrificing the activity. Here, we report a high-performing OER catalyst by immobilizing Ir single atoms on a polyimide support, which exhibits a high mass activity on a carbon paper electrode while simultaneously achieving outstanding stability with negligible decay for 360 h. The resulting electrode (denoted as Ir 1 −PI@CP) reaches a 49.7-fold improvement in mass activity compared to the counterpart electrode prepared without polyimide support. Both our experimental and theoretical results suggest that, owing to the strong metal−support interactions, the polyimide support can enhance the Ir 5d states of Ir single atoms in Ir 1 −PI@CP, which can tailor the adsorption energies of intermediates and decrease the thermodynamic barrier at the ratedetermining step of the OER, but also facilitate the proton−electron-transfer process and improve the reaction kinetics. This work offers an alternative avenue for developing single-atom catalysts with superior activity and durability toward various catalytic systems and beyond.

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“…Electrochemical water splitting has become an inspiring route for efficient hydrogen production using renewable clean energy. 1–3 The oxygen evolution reaction (OER), the anodic reaction of water splitting, remains a bottleneck limiting the energy efficiency, which renders slower reaction kinetics compared to the cathodic reaction of water splitting. Numerous previous studies have revealed that an iridium (Ir)-based catalyst is one of the most appropriate OER catalysts, due to the appropriate adsorption energies for reaction intermediates.…”

mentioning

confidence: 99%