The Significance of Properly Reporting Turnover Frequency in Electrocatalysis Research

Angewandte Chemie International Edition, Journal Year: 2021, Volume and Issue: 60(43), P. 23051 - 23067

Published: Sept. 15, 2021

For decades, turnover frequency (TOF) has served as an accurate descriptor of the intrinsic activity a catalyst, including those in electrocatalytic reactions involving both fuel generation and consumption. Unfortunately, most recent reports this area, TOF is often not properly reported or at all, contrast to overpotentials benchmarking current density. The density significant determining apparent activity, but it affected by catalyst-centric parasitic reactions, electrolyte-centric competing capacitance. Luckily, calculated can precisely give free from these phenomena electrocatalysis. In Viewpoint we ask: 1) What makes commonly used markers unsuitable for determination? 2) How reflect activity? 3) Why still underused electrocatalysis? 4) methods are 5) essential more calculation TOF? Finally, significance normalizing Faradaic efficiency (FE) stressed our views on development universal analytical tools determine exact number active sites real surface area all kinds materials.

Language: Английский

---

Water electrolysis

Nature Reviews Methods Primers, Journal Year: 2022, Volume and Issue: 2(1)

Published: Oct. 27, 2022

Language: Английский

---

Regulating active hydrogen adsorbed on grain boundary defects of nano-nickel for boosting ammonia electrosynthesis from nitrate

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(6), P. 2611 - 2620

Published: Jan. 1, 2023

The grain boundary defect engineered Ni nanoparticles has been explored for boosting selective nitrate electroreduction to ammonia, and its NH 3 generation rate is much higher than those of the reported copper or noble metal-based catalysts.

Language: Английский

---

Pd–PdO Nanodomains on Amorphous Ru Metallene Oxide for High‐Performance Multifunctional Electrocatalysis

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(12)

Published: Jan. 4, 2023

Developing highly efficient multifunctional electrocatalysts is crucial for future sustainable energy pursuits, but remains a great challenge. Herein, facile synthetic strategy used to confine atomically thin Pd-PdO nanodomains amorphous Ru metallene oxide (RuO2 ). The as-synthesized electrocatalyst (Pd2 RuOx-0.5 h) exhibits excellent catalytic activity toward the pH-universal hydrogen evolution reaction (η10 = 14 mV in 1 m KOH, η10 12 0.5 H2 SO4 , and 22 PBS), alkaline oxygen 225 mV), overall water splitting (E10 1.49 V) with high mass operational stability. Further reduction endows material RuOx-2 promising activity, evidenced by halfway potential, four-electron selectivity, poison tolerance. enhanced attributed rational integration of favorable nanostructures, including 1) nanosheet morphology, 2) coexisting defective crystalline phases, 3) multi-component heterostructural features. These structural factors effectively regulate material's electronic configuration adsorption intermediates at active sites energetics.

Language: Английский

---

A review of modulation strategies for improving catalytic performance of transition metal phosphides for oxygen evolution reaction

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 325, P. 122313 - 122313

Published: Dec. 21, 2022

Language: Английский

---

Metal–Organic Framework‐Derived Hollow CoS_x Nanoarray Coupled with NiFe Layered Double Hydroxides as Efficient Bifunctional Electrocatalyst for Overall Water Splitting

Small, Journal Year: 2022, Volume and Issue: 18(16)

Published: March 15, 2022

Abstract For effective hydrogen production by water splitting, it is essential to develop earth‐abundant, highly efficient, and durable electrocatalysts. Herein, the authors report a bifunctional electrocatalyst composed of hollow CoS x Ni–Fe based layered double hydroxide (NiFe LDH) nanosheets for efficient overall splitting (OWS). The optimized heterostructure obtained electrodeposition NiFe LDH on metal–organic framework‐derived nanoarrays, which are supported nickel foam (H‐CoS @NiFe LDH/NF). unique structure hybrid material not only provides ample active sites, but also facilitates electrolyte penetration gas release during reactions. Additionally, strong coupling synergy between evolution reaction (HER) oxygen (OER) gives rise excellent properties. Consequently, H‐CoS LDH/NF exhibits remarkable HER OER activities with overpotentials 95 250 mV, respectively at 10 mA cm −2 in 1.0 M KOH. Even A , electrode requires small 375 mV (for HER) 418 OER), respectively. An electrolyzer demonstrates low cell voltage 1.98 V current density 300 good durability 100 h OWS application.

Language: Английский

---

Low-temperature water electrolysis: fundamentals, progress, and new strategies

Materials Advances, Journal Year: 2022, Volume and Issue: 3(14), P. 5598 - 5644

Published: Jan. 1, 2022

The fundamentals, standardization, innovative strategies, and future direction of low-temperature water electrolysis including alkaline (AWE), proton exchange membrane (PEMWE), anion (AEMWE) electrolyses are discussed.

Language: Английский

---

Recent Progress on Bimetallic‐Based Spinels as Electrocatalysts for the Oxygen Evolution Reaction

Small, Journal Year: 2022, Volume and Issue: 18(41)

Published: Aug. 22, 2022

Abstract Electrocatalytic water splitting is a promising and viable technology to produce clean, sustainable, storable hydrogen as an energy carrier. However, meet the ever‐increasing global demand, it imperative develop high‐performance non‐precious metal‐based electrocatalysts for oxygen evolution reaction (OER), OER considered bottleneck electrocatalytic splitting. Spinels, in particular, are due their unique properties, precise structures, compositions. Herein, recent progress on application of bimetallic‐based spinels (AFe 2 O 4 , ACo AMn ; where A = Ni, Co, Cu, Mn, Zn) presented. The fundamental concepts highlighted after which family spinels, general formula, classifications introduced. This followed by overview various developments applications electrocatalysts, with special emphasis enhancing strategies that have been formulated improve performance these spinels. In conclusion, this review summarizes all studies mentioned therein provides challenges future perspectives spinel electrocatalysts.

Language: Английский

---

Hydrogen and value-added products yield from hybrid water electrolysis: A critical review on recent developments

Renewable and Sustainable Energy Reviews, Journal Year: 2023, Volume and Issue: 177, P. 113227 - 113227

Published: March 4, 2023

Language: Английский

---

How properly are we interpreting the Tafel lines in energy conversion electrocatalysis?

Materials Today Energy, Journal Year: 2022, Volume and Issue: 29, P. 101123 - 101123

Published: Aug. 18, 2022

Language: Английский

---