Unraveling Double-Exchange Effect Coupling Spin Modulation of Sr2Fe1.5Mo0.5O6-δ Electrocatalyst for Solid Oxide Cells DOI
Yuanfeng Liao, Jun Liu, Hao Chen

и другие.

Journal of the American Chemical Society, Год журнала: 2025, Номер unknown

Опубликована: Июнь 3, 2025

Perovskites are promising electrocatalysts for solid oxide cells (SOCs) due to their tunable structures. The reactivity/stability can be effectively enhanced by tuning the spin, whereas few studies have been able elucidate correlation between spin and reactivity/stability. Herein, double-exchange effect coupling modulation is studied Sr2Fe1.3Ni0.2Mo0.5O6, which exhibits a current density of 2.48 A cm-2 with high stability at 800 °C 1.5 V as cathode in CO2 reduction. Based on Mössbauer spectroscopy, X-ray absorption functional theory calculations, it revealed that doped Ni induces an additional conductivity modulation. It produces high-spin Fe4+ (t2g3eg1) vacant eg orbitals accommodate electrons from lone pairs oxygen, thus facilitating reduction enhancing adsorption weakening CO adsorption. This work provides general strategy design SOC electrocatalysts.

Язык: Английский

Single‐Atom Enables Reverse Hydrogen Spillover for High‐Performance Protonic Ceramic Fuel Cells DOI Open Access

Sunce Zhao,

Wenjia Ma, Beibei He

и другие.

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 24, 2025

Protonic ceramic fuel cells (PCFCs) offer a promising avenue for sustainable energy conversion, however, their commercial potential is hindered by sluggish proton-involved oxygen reduction reaction (P-ORR) kinetics and inadequate durability of cathode materials. Here, novel single-atom Ru anchor on BaCe0.125Fe0.875O3-δ (BCF) perovskite, synthesized facile scalable solid-state approach, as PCFCs reported. Theoretical experimental analyses demonstrate that the BCF, characterized unique 4-coordinate Ru-O-Fe configuration, not only induces reverse hydrogen spillover but also acts an active site P-ORR. The application optimized 2Ru-BCF (2 wt.% Ru) in single cell delivers exceptional peak power density 1.78 W cm-2 at 700 °C, along with excellent operational stability over 200 h. These findings provide new insights into engineering, advancing viability PCFCs.

Язык: Английский

Процитировано

0
Insights into metal-support interaction in steam reforming reactions for hydrogen production: A recent review DOI
Chunsheng Wang,

Xueyu Ren,

Hongxia Cao

и другие.

International Journal of Hydrogen Energy, Год журнала: 2025, Номер 111, С. 808 - 832

Опубликована: Фев. 27, 2025

Язык: Английский

Процитировано

0
Facile Synthesis of Highly Active and Ultrastable Palladium Catalysts for Formaldehyde Oxidation DOI Open Access
Fen Wang,

Z.G. Zhang,

Jianjun Shi

и другие.

ChemistrySelect, Год журнала: 2025, Номер 10(13)

Опубликована: Март 28, 2025

Abstract Formaldehyde (HCHO), a common pollutant in industrial productions and indoor environments, poses health risks to humans. Thermal catalytic oxidation has been regarded as an effective approach eliminate formaldehyde pollution due its environmental benefits operational convenience. In this study, Pd‐based catalyst with high dispersion of Pd was prepared by facile impregnation method choosing the appropriate calcination temperature MgFe 2 O 4 support, which demonstrated excellent activity robustness during long term test 60 h conducted at 30 °C WHSV 30,000 mL/(g‐h). A comprehensive set characterizations, such N physisorption, CO chemisorption, STEM, XRD, XPS, H ‐TPR, ‐TPD, were employed. The results revealed that outstanding stability resulted from Pd, good oxygen mobility, strong antioxidant capacity low desorption temperature, amount temperature. This study presents palladium significant application potential removal.

Язык: Английский

Процитировано

0
Electrochemical Methane Reforming on La0.5Ce0.5Fe0.5Ni0.5O3−δ Anode in Solid Oxide Electrolysis Cells DOI
Wenxin Fu, Yige Guo,

Jianqiu Zhu

и другие.

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Апрель 25, 2025

Coupling the partial oxidation of methane (POM) to anode solid oxide electrolysis cells (SOECs) can significantly decrease open-circuit voltage and electrical energy consumption SOECs. However, developing advanced for SOEC selectively convert CH4 syngas still remains a great challenge. Herein, we find that Ce substitution at A-site La0.5Ce0.5Fe0.5Ni0.5O3-δ effectively alter chemical state coordination environment Ni with generation NiO particles, air activation could further regulate oxygen vacancy concentration size which both contribute enhanced POM performance conversion 45.20% CO selectivity 92.67% 650 °C. Moreover, introduction remarkably production from 3.64 kWh m-3 conventional SOECs 0.86 CH4-assisted This study provides an effective strategy improving electrochemical CO2 in while simultaneously converting anode.

Язык: Английский

Процитировано

0
Pt-Ni bimetallic alloy catalyst with strong metal support interactions for Bi-Reforming to produce syngas DOI
Yongyue Wang,

Bing Han,

Cai Zeng

и другие.

Separation and Purification Technology, Год журнала: 2025, Номер unknown, С. 133310 - 133310

Опубликована: Апрель 1, 2025

Язык: Английский

Процитировано

0
Operando TEM Probes Dynamic Evolution of Transition Metal‐Based Catalysts and Their Heterostructures DOI
Bo Yuan,

Yuchen Zhu,

Shu-Hui Liu

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 16, 2025

Abstract Transition metals‐based catalysts and their heterostructures represent a critical category of catalytic materials, understanding mechanisms achieving precise synthesis are paramount importance. Operando transmission electron microscopy (TEM) enables real‐time monitoring sample responses to external stimuli, which is crucial for observing structural, compositional, electronic changes in nanocatalysts during reactions aids designing efficient establishing atomic‐level structure‐property relationships. This review discusses how operando TEM, with its high spatial temporal resolution, observation phenomena such as nucleation, growth, sintering, single‐atom dispersion nanocatalysts. The effects including gas atmosphere, thermal, optical, electrical fields, on the structural chemical properties analyzed. Moreover, application TEM evolution signal under operating conditions discussed, providing essential insights into ‘black box’ heterogeneous reactions. It anticipated that these efforts will further facilitate development novel high‐performance deepen material structure‐performance relationships at more profound level.

Язык: Английский

Процитировано

0
Unraveling Double-Exchange Effect Coupling Spin Modulation of Sr2Fe1.5Mo0.5O6-δ Electrocatalyst for Solid Oxide Cells DOI
Yuanfeng Liao, Jun Liu, Hao Chen

и другие.

Journal of the American Chemical Society, Год журнала: 2025, Номер unknown

Опубликована: Июнь 3, 2025

Perovskites are promising electrocatalysts for solid oxide cells (SOCs) due to their tunable structures. The reactivity/stability can be effectively enhanced by tuning the spin, whereas few studies have been able elucidate correlation between spin and reactivity/stability. Herein, double-exchange effect coupling modulation is studied Sr2Fe1.3Ni0.2Mo0.5O6, which exhibits a current density of 2.48 A cm-2 with high stability at 800 °C 1.5 V as cathode in CO2 reduction. Based on Mössbauer spectroscopy, X-ray absorption functional theory calculations, it revealed that doped Ni induces an additional conductivity modulation. It produces high-spin Fe4+ (t2g3eg1) vacant eg orbitals accommodate electrons from lone pairs oxygen, thus facilitating reduction enhancing adsorption weakening CO adsorption. This work provides general strategy design SOC electrocatalysts.

Язык: Английский

Процитировано

0