Synergetic Effect of Ni-Substituted Pd₂Ge Ordered Intermetallic Nanocomposites for Efficient Electrooxidation of Ethanol in Alkaline Media

Athimotlu Raju Rajamani; P. C. Ashly; Lakshay Dheer; Saurav Ch. Sarma; Sumanta Sarkar; Debabrata Bagchi; Umesh V. Waghmare; Sebastian C. Peter

doi:10.1021/acsaem.9b01049

journal article·2019-10-28

Synergetic Effect of Ni-Substituted Pd₂Ge Ordered Intermetallic Nanocomposites for Efficient Electrooxidation of Ethanol in Alkaline Media

Athimotlu Raju Rajamani, P. C. Ashly, Lakshay Dheer, Saurav Ch. Sarma, Sumanta Sarkar, Debabrata Bagchi, Umesh V. Waghmare, Sebastian C. Peter

ACS Applied Energy Materials· Volume 2· Issue 10

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Abstract

Development of highly active and stable low-cost Pt-free catalysts for ethanol electrooxidation (EOR) in alkaline medium has drawn a lot of attention in recent years. Palladium-based catalysts are on the forefront of this research. Pd2Ge, previously developed by our group, is a highly active and stable catalyst for EOR because of its ordered structure and the presence of Ge. In this work, we used it as a platform to further enhance its efficiency by Ni substitution (Pd2–xNixGe), which shifts the d-band center of the catalysts toward the Fermi level with the increasing binding energy toward the adsorbate. Stronger interaction between the Ni, Pd, and Ge atoms leads to stronger adsorption of −OH intermediates (−436 kJ/mol) and weaker adsorption of −CH3CO (−220 kJ/mol). As a result, this catalyst exhibits 3.8 times higher mass activity and 70 mV lower onset potential than pristine Pd2Ge for EOR in alkaline media.

Source: openalex_inverted_index · Quality: baseline

Research context

Metals & alloys Nanomaterials Catalysis & surfaces

OpenAlex topics: Electrocatalysts for Energy Conversion · Catalytic Processes in Materials Science · Fuel Cells and Related Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560064, India

School of Advanced Materials, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560064, India

Department of Chemistry, St. Joseph’s College, 36, Langford Road, Bangalore, 560027, India

Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560064, India

Theoretical Sciences Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560064, India

Funding

Council of Scientific and Industrial Research · Department of Science and Technology, Ministry of Science and Technology · Jawaharlal Nehru Centre for Advanced Scientific Research

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