研究者詳細 - 山方　啓

論文 - 山方　啓

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Transport channels of X-ray beamlines at SPring-8

Goto, S, Ohashi, H, Takeshita, K, Yabashi, M, Yamakata, A, Asano, Y, Ishikawa, T

Nuclear Instruments & Methods in Physics Research Section a-Accelerators Spectrometers Detectors and Associated Equipment 467 2001年

Transport channels of X-ray beamlines at SPring-8

Akira Yamakata

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 2001年

Exchange reaction of formate with gas-phase acetic acid on Ni(110) 査読

A Yamakata, J Kubota, JN Kondo, C Hirose, K Domen, F Wakabayashi, K Tamaru

SURFACE SCIENCE 433 210 - 214 1999年8月

In situ observation of the exchange reaction of formate with molecular formic acid on Ni(110) 査読

A Yamakata, J Kubota, JN Kondo, C Hirose, K Domen, F Wakabayashi, K Tamaru

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL 141 ( 1-3 ) 73 - 82 1999年5月

Exchange reaction of adsorbed formate with gaseous formic acid on Ni(110) studied by time-resolved Fourier transform infrared reflection absorption spectroscopy 査読

A Yamakata, J Kubota, JN Kondo, C Hirose, K Domen, F Wakabayashi, K Tamaru

JOURNAL OF PHYSICAL CHEMISTRY B 102 ( 22 ) 4401 - 4403 1998年5月

時間分解赤外反射吸収分光法によるNi(110)表面に吸着したフォルメートと気相に導入したギ酸の交換反応査読

山方啓, 久保田純, 野村淳子, 廣瀬千秋, 堂免一成, 若林文高

表面科学 19 ( 7 ) 441 - 445 1998年

出版者・発行元：The Surface Science Society of Japan

The exchange reaction of formate (DCOO(a)) with gaseous formic acid (HCOOD) on Ni(110) was investigated below the decomposition temperature of formate (340 K) by means of time-resolved infrared reflection absorption spectroscopy (TR-IRAS). When HCOOD gas was admitted on DCOO(a)-covered Ni(110) at 300 K, the pre-adsorbed DCOO(a) was replaced by HCOO(a). Similar replacement was also observed by introducing H<SUP>12</SUP> COOH gas onto H-<SUP>13</SUP>COO(a)-covered Ni(110). In such a temperature region from 240 to 300 K, no decomposition of formate was observed. Thus it was confirmed that those pre-adsorbed formate desorbed as formic acid accompanied by the transfer of hydrogen (deuterium) atom from post-introduced formic acid. The kinetics of the exchange reaction is investigated and the mechanism of that is also discussed.

DOI： 10.1380/jsssj.19.441

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赤外反射吸収分光法によるNi(110)上に吸着したギ酸の分解過程の観察査読

山方啓, 久保田純, 野村淳子, 廣瀬千秋, 堂免一成, 若林文高

表面科学 18 ( 7 ) 417 - 423 1997年7月

記述言語：日本語出版者・発行元：日本表面科学会

The decomposition of the surface formate on Ni(110) was studied by temperature programmed desorption (TPD) and timeresolved infrared reflection absorption spectroscopy (TR-IRAS). It was observed that dehydration proceeded simultaneously with dehydrogenation. The rate-determining step of dehydration was found to be the C-H bond cleavage of formate as is the case of dehydrogenation by analysis of the kinetic isotope effect using HCOO(a) and DCOO(a). These results suggest that the rate-determining steps of dehydration and dehydrogenation are common. We propose a mechanism in which the CO₂(a) species formed via the C-H bond cleavage of formate acts as the intermediate not only for dehydrogenation but also for dehydration; dehydration takes place by dissociation of the C-O bond of CO₂(a).

DOI： 10.1380/jsssj.18.417

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In situ observation of the dehydration of formate on Ni(110) 査読

A Yamakata, J Kubota, JN Kondo, C Hirose, K Domen, F Wakabayashi

JOURNAL OF PHYSICAL CHEMISTRY B 101 ( 26 ) 5177 - 5181 1997年6月

Isotope exchange reaction of formate with molecular hydrogen on Ni(110) by IRAS 査読

A Yamakata, J Kubota, JN Kondo, K Domen, C Hirose

JOURNAL OF PHYSICAL CHEMISTRY 100 ( 46 ) 18177 - 18182 1996年11月

SFG Study of Formic Acid on a Pt(110)-(1ｘ2) Surface 査読

WATANABE N, IWATSU K, YAMAKATA Akira, OHTANI T, KUBOTA Jun, KONDO J. N, WADA A, DOMEN Kazunari, HIROSE Chiaki

Surf Sci 357 ( 1-3 ) 651 - 655 1996年6月

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