Strain Influences the Hydrogen Evolution Activity and Absorption Capacity of Palladium

Jansonius, Ryan P.; Schauer, Phil A.; Dvořák, Dalimil; MacLeod, Benjamin P.; Fork, D. K.; Berlinguette, Curtis P.

doi:10.1002/anie.202005248

Cited by 33 publications

(32 citation statements)

References 45 publications

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“…The commonly nanoparticle fixed working condition has been used to evaluate and characterize the performance of Pd electrocatalysts, where Pd NPs are typically dispersed in water/ethanol solvents containing Nafion, and the mixture is sonicated and drop‐casted onto the surface of a millimeter‐sized electrode. The HER process performing on the Pd NPs is monitored by electrochemical measurements, such as cyclic voltammetry, linear sweep voltammetry, electrochemical impedance spectroscopy, etc [6] . However, the nanoparticles fixed on the electrode surface usually undergo the aggregation, deactivation, and detachment during the electrocatalysis process, hindering the accurate and repeatable evaluation of catalyst activity [7] .…”

Section: Methodsmentioning

confidence: 99%

Tracking the Electrocatalytic Activity of a Single Palladium Nanoparticle for the Hydrogen Evolution Reaction

Mengjie

Peng

et al. 2021

Chemistry A European J

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The nanoparticle‐based electrocatalysts’ performance is directly related to their working conditions. In general, a number of nanoparticles are uncontrollably fixed on a millimetre‐sized electrode for electrochemical measurements. However, it is hard to reveal the maximum electrocatalytic activity owing to the aggregation and detachment of nanoparticles on the electrode surface. To solve this problem, here, we take the hydrogen evolution reaction (HER) catalyzed by palladium nanoparticles (Pd NPs) as a model system to track the electrocatalytic activity of single Pd NPs by stochastic collision electrochemistry and ensemble electrochemistry, respectively. Compared with the nanoparticle fixed working condition, Pd NPs in the nanoparticle diffused working condition results in a 2–5 orders magnitude enhancement of electrocatalytic activity for HER at various bias potential. Stochastic collision electrochemistry with high temporal resolution gives further insights into the accurate study of NPs’ electrocatalytic performance, enabling to dramatically enhance electrocatalytic efficiency.

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Section: Methodsmentioning

confidence: 99%

Tracking the Electrocatalytic Activity of a Single Palladium Nanoparticle for the Hydrogen Evolution Reaction

Mengjie

Peng

et al. 2021

Chemistry A European J

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“…The tensile strain will increase the hydrogen recombination rate, thus improving the HER activity ( Table 2 ). [ 155 ]…”

Section: Surface Regulation For Enhanced Her Activitymentioning

confidence: 99%

Surface Design Strategy of Catalysts for Water Electrolysis

Zhou

Gao

Zou

et al. 2022

Small

233

103

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consumption leads to a range of environmental problems such as air pollution, thermal pollution, global warming, and resource shortage. [1,2] Therefore, the development of clean, renewable, and new energy that can replace traditional fossil fuels is the top priority of energy development. [3] Hydrogen energy is the most promising clean energy, with high combustion calorific value (4.5 times coke). [4] Hydrogen produces water when converting chemical energy, contributing to recycling resources. [5] There are three kinds of techniques for hydrogen production: photocatalysis, water electrolysis, and biomass reforming. Global generate electricity by using renewable energy such as wind, water, and solar energy, but the storage problem of electricity leads to incomplete utilization of electricity. [6][7][8] Water electrolysis only needs renewable electric power to drive the reaction, and it has attracted wide attention due to pollution-free and low cost. [9] As a result, water electrolysis has very broad prospects in solving energy and environmental problems.Water electrolysis technology gets hydrogen by converting electrical energy into chemical energy, oxygen is obtained on the anode via the oxygen evolution reaction (OER), and hydrogen is obtained on the cathode via the hydrogen evolution reaction (HER). [10] As commercial electrocatalysts on the anode side of electrolyzer, Ir-based catalysts can not only survive under high corrosion conditions but also show efficient catalytic performance. Noble metal materials (Ir-based OER catalysts and Pt-based HER catalysts) are the best catalysts, but the high price and rare reserves limit their long-term commercial applications. [11,12] Therefore, catalysts with high activity and low cost are the ongoing research targets. The exposure of OER catalysts to highly corrosive and oxidative conditions cause severe inactivation and instability, which is one of bottlenecks for largescale application of water electrolysis. The most stable catalyst is the corroded Fe foam, which maintains a current density of 1000 mA cm −2 at 5000 h. [13] Co 3 O 4 @CoO can maintain a steady current of >1000 h without showing significant decay. [14] However, the short-term stability of some catalysts does not meet the requirements of practical applications.This review presents the recent progress of OER and HER catalysts. Through a summary of the reaction mechanisms of OER and HER, it is clear about the specific steps in the occurrence of OER and HER. The rate-determining steps of OER and HER can indicate a specific direction for the design of the catalysts. And then focus on the recent progress on surface design of various OER and HER catalysts and find that the catalyst surface regulation plays an important role in the catalyst design.Hydrogen, a new energy carrier that can replace traditional fossil fuels, is seen as one of the most promising clean energy sources. The use of renewable electricity to drive hydrogen production has very broad prospects for addressing energy and environmental problems. T...

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“…[14,[17][18][19][20] However,t he underlying mechanism of the increasement remains murky.T his is largely due to the fact that two intertwined mechanisms,i.e., ligand effect and strain effect, are at play in these core/shell nanocatalysts. [19,[21][22][23] And it has been exceedingly difficult to disentangle the respective contributions,which is particularly troublesome when the two effects have opposite contributions. [21,24] Indeed, not knowing the relative importance of the two effects has significantly hampered the development of superior core/shell nanocatalysts.…”

Section: Introductionmentioning

confidence: 99%

Exclusive Strain Effect Boosts Overall Water Splitting in PdCu/Ir Core/Shell Nanocrystals

Zhao

Xia

et al. 2021

Angewandte Chemie

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Core/shell nanocatalysts are ac lass of promising materials,w hicha chieve the enhanced catalytic activities through the synergy between ligand effect and strain effect. However,i th as been challenging to disentangle the contributions from the two effects,whichhinders the rational design of superior core/shell nanocatalysts.H erein, we report precise synthesis of PdCu/Ir core/shell nanocrystals,w hichc an significantly boost oxygen evolution reaction (OER) via the exclusive strain effect. The heteroepitaxial coating of four Ir atomic layers onto PdCu nanoparticle gives arelatively thickIr shell eliminating the ligand effect, but creates ac ompressive strain of ca. 3.60%. The strained PdCu/Ir catalysts can deliver al ow OER overpotential and ah igh mass activity.D ensity functional theory (DFT) calculations reveal that the compressive strain in Ir shell downshifts the d-band center and weakens the binding of the intermediates,c ausing the enhanced OER activity.The compressive strain also boosts hydrogen evolution reaction (HER) activity and the strained nanocrystals can be served as excellent catalysts for both anode and cathode in overall water-splitting electrocatalysis.

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Strain Influences the Hydrogen Evolution Activity and Absorption Capacity of Palladium

Cited by 33 publications

References 45 publications

Tracking the Electrocatalytic Activity of a Single Palladium Nanoparticle for the Hydrogen Evolution Reaction

Tracking the Electrocatalytic Activity of a Single Palladium Nanoparticle for the Hydrogen Evolution Reaction

Surface Design Strategy of Catalysts for Water Electrolysis

Exclusive Strain Effect Boosts Overall Water Splitting in PdCu/Ir Core/Shell Nanocrystals

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