journal article·2017-09-28

Anchoring Bond between Ru and N Atoms of Ru/Ca2NH Catalyst: Crucial for the High Ammonia Synthesis Activity

Hitoshi Abe, Yasuhiro Niwa, Masaaki Kitano, Yasunori Inoue, Masato Sasase, Takuya Nakao, Tomofumi Tada, Toshiharu Yokoyama, Michikazu Hara, Hideo Hosono

The Journal of Physical Chemistry C· Volume 121· Issue 38
Publisher page

Abstract

Key functions for the stability and activity of Ru catalysts for ammonia synthesis were examined by X-ray absorption fine structure (XAFS) experiments. Ru K-edge XAFS measurements were carried out for two Ru catalysts, Ru/Ca 2 NH and Ru/CaNH, which include N atoms in the supports. The stable Ru–N bond was observed in the Ru/Ca 2 NH catalyst, but not in the Ru/CaNH catalyst, which was also supported by theoretical calculations in terms of Ru–anion bond strength. The bond observed in the Ru/Ca 2 NH works to anchor the Ru nanoparticles to the Ca 2 NH support, and the activity has been maintained. Formation of anchoring bonds between catalyst particles and supports is essential to create highly active and long lasting catalysts.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Ammonia Synthesis and Nitrogen Reduction · Nanomaterials for catalytic reactions · Catalytic Processes in Materials Science

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

Affiliations

Institute of Materials Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan

Department of Materials Structure Science, School of High Energy Accelerator Science, SOKENDAI (the Graduate University for Advanced Studies), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan

ACCEL, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan

Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan

Laboratory for Materials and Structures, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan

Funding

Accelerated Innovation Research Initiative Turning Top Science and Ideas into High-Impact Values

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