Hierarchically Structured Catalysts toward Sustainable Hydrogen Economy: Electro‐ and Thermo‐chemical Pathways DOI Open Access
Chenxin Deng, Binchao Zhao, Pu‐Xian Gao

et al.

ChemSusChem, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 18, 2024

Abstract Hydrogen, as an important clean energy source, plays a more and crucial role in decarbonizing the planet meeting global climate challenge due to its high density zero‐emission. The demand for sustainable hydrogen is increasing drastically worldwide driven by shift towards low‐carbon solutions. Thermochemical catalysis process dominates production at scale given relatively mature technology commercialization status, well established manufacturing infrastructure. While environmentally friendly nature growing abundant sources of renewable electricity, electrochemical path rising major alternative thermochemical means. Nevertheless, hierarchically structured catalysts devices have gradually taken center stage toward replacing traditional counterparts, especially with rapid advancement design manufacture such ordered nanostructure assemblies activity, efficient mass transport, superb stability. In this review, latest progress been surveyed on electro‐ thermo‐ chemical pathways comparatively. It covers structure designs atomic dispersion, nanoscale surfaces interfaces achieving highly active durable catalysts, components, devices. Both approaches are reviewed terms vast details, engineered benefits, understandings various Pt‐group metal (PGM) non‐PGM based transition production. As trend, brief discussions also presented high‐level assembly complexly components systems.

Language: Английский

Regulation of Electron and Mass Transport Pathways in Efficient and Stable Low‐Loading PEM Water Electrolyzers DOI Open Access
Zengyin Wen, Yujiao Sun, Wenzheng Li

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 26, 2025

Improving the utilization of iridium in proton exchange membrane (PEM) water electrolyzer is critical reducing their cost for future development. Titanium dioxide (TiO2) has notable electrochemical stability at high operating potential and been developed as a promising support iridium-based OER nano-catalysts. However, limited by insufficient conductivity, content on TiO2 catalysts normally above 50 wt.%. Herein, provided conductivity-enhanced low-iridium-loading PEMWE, successfully to 28 wt.% regulation electron transport pathway. A new ionomer distribution strategy then applied Ir@Pt@TiO2 catalyst layer release sites regulate local mass pathways anode. This work reveals that catalyst-ionomer interface played an important role activity anode PEMWE. Building thin uniform supports with exposure can result continuous pathways, promoting bubble escape, exposing more effective active during reaction situations. provides novel perspective research PEMWEs.

Language: Английский

Citations

0
Designing Electrodes with No Ionomers: A Perspective on Ionomer-Free Electrodes for Proton-Exchange-Membrane Water Electrolyzers DOI

Abdullah Tayyem,

Jason Keonhag Lee

ACS Applied Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

Language: Английский

Citations

0
Scalable Ir-Doped NiFe2O4/TiO2 Heterojunction Anode for Decentralized Saline Wastewater Treatment and H2 Production DOI Creative Commons

Sukhwa Hong,

Jiseon Kim, Jaebeom Park

et al.

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 17(1)

Published: Oct. 28, 2024

Abstract Wastewater electrolysis cells (WECs) for decentralized wastewater treatment/reuse coupled with H 2 production can reduce the carbon footprint associated transportation of water, waste, and energy carrier. This study reports Ir-doped NiFe O 4 (NFI, ~ 5 at% Ir) spinel layer TiO overlayer (NFI/TiO ), as a scalable heterojunction anode direct circumneutral pH in single-compartment cell. In dilute (0.1 M) NaCl solutions, NFI/TiO marks superior activity selectivity chlorine evolution reaction, outperforming benchmark IrO . Robust operation near-neutral was confirmed. Electroanalyses including operando X-ray absorption spectroscopy unveiled crucial roles which serves both primary site Cl − chemisorption protective NFI an ohmic contact. Galvanostatic NH + -laden synthetic demonstrated that not only achieves quasi-stoichiometric -to-N conversion, but also enhances generation efficiency minimal competing reactions such reduction dissolved oxygen reactive chlorine. The scaled-up WEC toilet wastewater.

Language: Английский

Citations

3
Na-doped cobalt spinel electrocatalysts prepared by programmed electrostatic spraying for improving OER activity and durability in acidic media DOI
P. Huang, Feng Xu, Changjian Zhou

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 500, P. 156846 - 156846

Published: Oct. 23, 2024

Language: Английский

Citations

2
Multi-metal layer deposited carbon paper electrodes explored for stability enhancement of PEM water electrolysis DOI

Seong-Jun Kim,

Younghyun Lee, Yongchai Kwon

et al.

Applied Surface Science, Journal Year: 2024, Volume and Issue: unknown, P. 161965 - 161965

Published: Nov. 1, 2024

Language: Английский

Citations

2
Research Progress on the Application of One-Step Fabrication Techniques for Iridium-Based Thin Films in the Oxygen Evolution Reaction DOI Open Access
Wenting Li,

Junyu Zhu,

Hongzhong Cai

et al.

Coatings, Journal Year: 2024, Volume and Issue: 14(9), P. 1147 - 1147

Published: Sept. 6, 2024

Electrochemical water splitting, a sustainable method for hydrogen production, faces the challenge of slow oxygen evolution reaction (OER) kinetics. Iridium oxide (IrO2) is widely regarded as most effective catalyst OER due to its excellent properties. Compared nanoparticles, IrO2 thin films exhibit significant advantages in OER, including uniform and stable catalytic interface mechanical strength. This paper reviews recent advancements one-step deposition techniques preparation their application OER. Additionally, it analyzes disadvantages various methods latest research achievements, briefly outlines future trends applications.

Language: Английский

Citations

1
Porous network of boron-doped IrO2 nanoneedles with enhanced mass activity for acidic oxygen evolution reactions DOI

Fei Hu,

P. Huang, Feng Xu

et al.

Materials Horizons, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

While proton exchange membrane water electrolyzers (PEMWEs) are essential for realizing practical hydrogen production, the trade-off among activity, stability, and cost of state-of-the-art iridium (Ir)-based oxygen evolution reaction (OER) electrocatalysts PEMWE implementation is still prohibitively challenging. Ir minimization coupled with mass activity improvement Ir-based catalysts a promising strategy to address this challenge. Here, we present discovery demonstrating that boron doping facilitates one-dimensional (1D) anisotropic growth IrO

Language: Английский

Citations

1
Inhibiting Emulative Oxygen Adsorption via Introducing Pt-Segregated Sites into the Pd Surface for Enhanced H2 Sensing in Air DOI

Yurou Li,

Yanfen Cao,

Xin Jia

et al.

ACS Sensors, Journal Year: 2024, Volume and Issue: 9(10), P. 5405 - 5413

Published: Oct. 11, 2024

Pd-modified metal sulfide gas sensors exhibit excellent hydrogen (H

Citations

0
Hierarchically Structured Catalysts toward Sustainable Hydrogen Economy: Electro‐ and Thermo‐chemical Pathways DOI Open Access
Chenxin Deng, Binchao Zhao, Pu‐Xian Gao

et al.

ChemSusChem, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 18, 2024

Abstract Hydrogen, as an important clean energy source, plays a more and crucial role in decarbonizing the planet meeting global climate challenge due to its high density zero‐emission. The demand for sustainable hydrogen is increasing drastically worldwide driven by shift towards low‐carbon solutions. Thermochemical catalysis process dominates production at scale given relatively mature technology commercialization status, well established manufacturing infrastructure. While environmentally friendly nature growing abundant sources of renewable electricity, electrochemical path rising major alternative thermochemical means. Nevertheless, hierarchically structured catalysts devices have gradually taken center stage toward replacing traditional counterparts, especially with rapid advancement design manufacture such ordered nanostructure assemblies activity, efficient mass transport, superb stability. In this review, latest progress been surveyed on electro‐ thermo‐ chemical pathways comparatively. It covers structure designs atomic dispersion, nanoscale surfaces interfaces achieving highly active durable catalysts, components, devices. Both approaches are reviewed terms vast details, engineered benefits, understandings various Pt‐group metal (PGM) non‐PGM based transition production. As trend, brief discussions also presented high‐level assembly complexly components systems.

Language: Английский

Citations

0