Effect of Water Vapor on Pd-Loaded SnO2 Nanoparticles Gas Sensor

Nan Ma; Koichi Suematsu; Masayoshi Yuasa; Tetsuya Kida; Kengo Shimanoe

doi:10.1021/am509082w

Effect of Water Vapor on Pd-Loaded SnO₂ Nanoparticles Gas Sensor

Nan Ma, Koichi Suematsu, Masayoshi Yuasa, Tetsuya Kida, Kengo Shimanoe

Functional Materials Science

Research output: Contribution to journal › Article › peer-review

180 Citations (Scopus)

Abstract

The effect of water vapor on Pd-loaded SnO₂ sensor was investigated through the oxygen adsorption behavior and sensing properties toward hydrogen and CO under different humidity conditions. On the basis of the theoretical model reported previously, it was found that the mainly adsorbed oxygen species on the SnO₂ surface in humid atmosphere was changed by loading Pd, more specifically, for neat SnO₂ was O^-, while for 0.7% Pd-SnO₂ was O^2-. The water vapor poisoning effect on electric resistance and sensor response was reduced by loading Pd. Moreover the sensor response in wet atmosphere was greatly enhanced by loading Pd. It seems that the electron depletion layer by p-n junction of PdO-SnO₂ may impede OH^- adsorption. (Graph Presented).

Original language	English
Pages (from-to)	5863-5869
Number of pages	7
Journal	ACS Applied Materials and Interfaces
Volume	7
Issue number	10
DOIs	https://doi.org/10.1021/am509082w
Publication status	Published - Mar 18 2015

All Science Journal Classification (ASJC) codes

Materials Science(all)

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title = "Effect of Water Vapor on Pd-Loaded SnO2 Nanoparticles Gas Sensor",

abstract = "The effect of water vapor on Pd-loaded SnO2 sensor was investigated through the oxygen adsorption behavior and sensing properties toward hydrogen and CO under different humidity conditions. On the basis of the theoretical model reported previously, it was found that the mainly adsorbed oxygen species on the SnO2 surface in humid atmosphere was changed by loading Pd, more specifically, for neat SnO2 was O-, while for 0.7% Pd-SnO2 was O2-. The water vapor poisoning effect on electric resistance and sensor response was reduced by loading Pd. Moreover the sensor response in wet atmosphere was greatly enhanced by loading Pd. It seems that the electron depletion layer by p-n junction of PdO-SnO2 may impede OH- adsorption. (Graph Presented).",

author = "Nan Ma and Koichi Suematsu and Masayoshi Yuasa and Tetsuya Kida and Kengo Shimanoe",

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AU - Ma, Nan

AU - Suematsu, Koichi

AU - Yuasa, Masayoshi

AU - Kida, Tetsuya

AU - Shimanoe, Kengo

PY - 2015/3/18

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N2 - The effect of water vapor on Pd-loaded SnO2 sensor was investigated through the oxygen adsorption behavior and sensing properties toward hydrogen and CO under different humidity conditions. On the basis of the theoretical model reported previously, it was found that the mainly adsorbed oxygen species on the SnO2 surface in humid atmosphere was changed by loading Pd, more specifically, for neat SnO2 was O-, while for 0.7% Pd-SnO2 was O2-. The water vapor poisoning effect on electric resistance and sensor response was reduced by loading Pd. Moreover the sensor response in wet atmosphere was greatly enhanced by loading Pd. It seems that the electron depletion layer by p-n junction of PdO-SnO2 may impede OH- adsorption. (Graph Presented).

AB - The effect of water vapor on Pd-loaded SnO2 sensor was investigated through the oxygen adsorption behavior and sensing properties toward hydrogen and CO under different humidity conditions. On the basis of the theoretical model reported previously, it was found that the mainly adsorbed oxygen species on the SnO2 surface in humid atmosphere was changed by loading Pd, more specifically, for neat SnO2 was O-, while for 0.7% Pd-SnO2 was O2-. The water vapor poisoning effect on electric resistance and sensor response was reduced by loading Pd. Moreover the sensor response in wet atmosphere was greatly enhanced by loading Pd. It seems that the electron depletion layer by p-n junction of PdO-SnO2 may impede OH- adsorption. (Graph Presented).

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Effect of Water Vapor on Pd-Loaded SnO₂ Nanoparticles Gas Sensor

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