Coordination Chemistry Reviews, Journal Year: 2025, Volume and Issue: 528, P. 216427 - 216427
Published: Jan. 9, 2025
Language: Английский
Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(12), P. 3960 - 4009
Published: Jan. 1, 2024
The general principles in terms of reactivity and stability to design efficient electrocatalysts for the alkaline hydrogen oxidation reaction are reviewed. performance catalysts anion-exchange membrane fuel cells is further discussed.
Language: Английский
Citations
29
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(28)
Published: April 26, 2024
Abstract Ruthenium (Ru) is considered a promising candidate catalyst for alkaline hydroxide oxidation reaction (HOR) due to its hydrogen binding energy (HBE) like that of platinum (Pt) and much higher oxygenophilicity than Pt. However, Ru still suffers from insufficient intrinsic activity CO resistance, which hinders widespread use in anion exchange membrane fuel cells (AEMFCs). Here, we report hybrid (RuCo) NC+SAs /N‐CNT consisting dilute RuCo alloy nanoparticles atomically single Co atoms on N‐doped carbon nanotubes The exhibits state‐of‐the‐art with high mass 7.35 A mg −1 . More importantly, when used as an anode AEMFCs, peak power density reaches 1.98 W cm −2 , one the best AEMFCs properties noble metal‐based catalysts at present. Moreover, has superior long‐time stability resistance. experimental functional theory (DFT) results demonstrate alloying monodecentralization exotic element greatly modulates electronic structure host Ru, thus optimizing adsorption H OH promoting surface, then stimulates HOR tolerance catalyst.
Language: Английский
Citations
18
Small, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 5, 2025
Abstract As global demand for clean and sustainable energy continues to rise, fuel cell technology has seen rapid advancement. However, the presence of trace impurities like carbon monoxide (CO) hydrogen sulfide (H₂S) in can significantly deactivate anode by blocking its active sites, leading reduced performance. Developing electrocatalysts that are resistant CO H₂S poisoning therefore become a critical priority. This paper provides comprehensive analysis mechanisms reviews key strategies developed over past few decades enhance impurity tolerance electrocatalysts. It begins examining differences oxidation reaction (HOR) acidic alkaline environments, focusing on roles binding (HBE) hydroxide (OHBE). Next, it outlines three main approaches mitigate poisoning: (I) bifunctional mechanisms, (II) direct (III) constructing protective layers. The review then shifts countering poisoning, emphasizing both electrocatalyst design structural improvements cells. Finally, highlights recent advances anti‐poisoning electrocatalysts, discusses their applications limitations, identifies challenges future opportunities further research this field.
Language: Английский
Citations
2
Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)
Published: Jan. 21, 2025
Anion exchange membrane fuel cells (AEMFCs) are one of the ideal energy conversion devices. However, platinum (Pt), as benchmark catalyst for hydrogen oxidation reaction (HOR) AEMFCs anodes, still faces issues insufficient performance and susceptibility to CO poisoning. Here, we report Joule heating-assisted synthesis a small sized Ru1Pt single-atom alloy loaded on nitrogen-doped carbon modified with single W atoms (s-Ru1Pt@W1/NC), in which near-range Ru nanoparticles long-range support simultaneously modulate electronic structure active Pt-site, enhancing alkaline HOR s-Ru1Pt@W1/NC. The mass activity s-Ru1Pt@W1/NC is 7.54 A mgPt+Ru-1 exhibits notable stability 1000 ppm CO/H2-saturated electrolyte. Surprisingly, it can operate stably H2-saturated electrolyte h only 24.60 % decay. Theoretical calculations demonstrate that proximal remote synergistically optimize improving tolerance catalyst. development anode catalysts anion-exchange promising but challenging practical applications. authors tiny catalyze very high activity, stability, resistance.
Language: Английский
Citations
2
The Journal of Physical Chemistry Letters, Journal Year: 2024, Volume and Issue: 15(11), P. 3011 - 3022
Published: March 11, 2024
The severe performance degradation of low-temperature hydrogen fuel cells upon exposure to trace amounts carbon monoxide (CO) impurities in reformate fuels is one the challenges that hinders their commercialization. Despite significant efforts have been made, CO-tolerance electrocatalysts for oxidation reaction (HOR) still unsatisfactory. This Perspective discusses path forward rational design CO-tolerant HOR electrocatalysts. fundamentals mechanisms on commercialized platinum group metal (PGM) via either promoting CO electrooxidation or weakening adsorption are provided, and comprehensive discussions based these strategies presented with typical examples. Given recent progress, some emerging strategies, including blocking diffusion a barrier layer developing non-PGM catalysts, also discussed. We conclude discussion strengths limitations along perspectives major opportunities future research
Language: Английский
Citations
13
ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(18), P. 13602 - 13629
Published: Aug. 28, 2024
The hydrogen oxidation reaction (HOR) is the anodic of hydrogen–oxygen fuel cells, which plays a decisive role in whole-device performance. However, inexpensive crude inevitably contains carbon monoxide (CO) impurities, and even state-of-the-art platinum (Pt) electrocatalysts can suffer an obvious activity decrease due to poisoning active sites, seriously hindering efficiency cells. Developing with promoted CO tolerance necessitates elucidation HOR mechanism deep understanding intrinsic nature cell poisoning. To date, weakening adsorption or accelerating its could improve catalyst, so it critical seek much more effective strategies. Based on study mechanism, this Review summarizes latest progress high stability against from two typical theories: binding energy theory bifunctional theory. strategies for enhancing catalysts are gathered, including electronic structure modulation, oxophilic dual-site construction. In addition, applications practical cells outlined. conclusion, discussion focuses challenges future outlook CO-tolerant electrocatalysts, objective offering distinct perspectives engineering design superior tolerance.
Language: Английский
Citations
13
Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 353, P. 124088 - 124088
Published: April 17, 2024
Language: Английский
Citations
12
Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(16), P. 5922 - 5930
Published: Jan. 1, 2024
The heterointerface of fcc 0.42 Ru–Sn catalyst exhibits strong interfacial synergy for balancing H 2 adsorption and enhancing alkaline HOR activity, thereby significantly improving the performance anion exchange membrane fuel cells.
Language: Английский
Citations
12
Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 358, P. 124422 - 124422
Published: July 20, 2024
Language: Английский
Citations
11
Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 28, 2024
Enhancing the activity and CO poisoning resistance of Pt-based catalysts for anodic hydrogen oxidation reaction (HOR) poses a significant challenge in development proton exchange membrane fuel cells. Herein, we leverage theoretical calculations to demonstrate that tungsten nitride (WN) can intricately modulate electronic structure Pt. This modulation optimizes adsorption, significantly boosting HOR activity, simultaneously weakens markedly improving poisoning. Through prescreening with rational design, synthesized an efficient catalyst comprising minimal Pt content (only 1.4 wt %) supported on small-sized WN/reduced graphite oxide (Pt@WN/rGO). As anticipated, this showcases remarkable acidic mass 3060 A g
Language: Английский
Citations
11