Stimulation of Electro-oxidation Catalysis by Bulk-Structural Transformation in Intermetallic ZrPt₃ Nanoparticles

Gubbala V. Ramesh; Rajesh Kodiyath; Toyokazu Tanabe; Maidhily Manikandan; Takeshi Fujita; Naoto Umezawa; Shigenori Ueda; Shinsuke Ishihara; Katsuhiko Ariga; Hideki Abe

doi:10.1021/am504147q

journal article·2014-09-24

Stimulation of Electro-oxidation Catalysis by Bulk-Structural Transformation in Intermetallic ZrPt₃ Nanoparticles

Gubbala V. Ramesh, Rajesh Kodiyath, Toyokazu Tanabe, Maidhily Manikandan, Takeshi Fujita, Naoto Umezawa, Shigenori Ueda, Shinsuke Ishihara, Katsuhiko Ariga, Hideki Abe

ACS Applied Materials & Interfaces· Volume 6· Issue 18

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Abstract

Although compositional tuning of metal nanoparticles (NPs) has been extensively investigated, possible control of the catalytic performance through bulk-structure tuning is surprisingly overlooked. Here we report that the bulk structure of intermetallic ZrPt3 NPs can be engineered by controlled annealing and their catalytic performance is significantly enhanced as the result of bulk-structural transformation. Chemical reduction of organometallic precursors yielded the desired ZrPt3 NPs with a cubic FCC-type structure (c-ZrPt3 NPs). The c-ZrPt3 NPs were then transformed to a different phase of ZrPt3 with a hexagonal structure (h-ZrPt3 NPs) by annealing at temperatures between 900 and 1000 °C. The h-ZrPt3 NPs exhibited higher catalytic activity and long-term stability than either the c-ZrPt3 NPs or commercial Pt/C NPs toward the electro-oxidation of ethanol. Theoretical calculations have elucidated that the enhanced activity of the h-ZrPt3 NPs is attributed to the increased surface energy, whereas the stability of the catalyst is retained by the lowered bulk-free-energy.

Source: openalex_inverted_index · Quality: baseline

Research context

Metals & alloys Nanomaterials Catalysis & surfaces Materials processing

OpenAlex topics: Electrocatalysts for Energy Conversion · Semiconductor materials and devices · Electrochemical Analysis and Applications

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

Affiliations

National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan

Crystal Growth Centre, Anna University, Chennai, Tamil Nadu 600-025, India

Precursory Research for Embryonic Science and Technology (PRESTO) and Core Research for Evolutionary Science and Technology (CREST), Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan

WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan

Synchrotron X-ray Station at SPring-8, National Institute for Materials Science, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan

WPI International Center for Material Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan

Funding

Japan Society for the Promotion of Science · Ministry of Education, Culture, Sports, Science, and Technology · Japan Science and Technology Agency

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