Metal‐to‐Oxide Molar Volume Ratio: The Overlooked Barrier to Solid‐State Electroreduction and a “Green” Bypass through Recyclable NH 4 HCO 3 | Zendy

Li Wei | Zendy; Jin Xianbo | Zendy; Huang Fulong | Zendy; Chen George Z. | Zendy

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Metal‐to‐Oxide Molar Volume Ratio: The Overlooked Barrier to Solid‐State Electroreduction and a “Green” Bypass through Recyclable NH 4 HCO 3

Author(s) -

Li Wei,

Jin Xianbo,

Huang Fulong,

Chen George Z.

Publication year - 2010

Publication title -

angewandte chemie international edition

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.831

H-Index - 550

eISSN - 1521-3773

pISSN - 1433-7851

DOI - 10.1002/anie.200906833

Subject(s) - oxide , metal , molar ratio , volume (thermodynamics) , porosity , porous medium , molar volume , chemistry , chemical engineering , materials science , catalysis , organic chemistry , physics , engineering , thermodynamics

Beating the barrier : The metal‐to‐oxide molar volume ratio V m / V o determines whether electroreduction of a metal oxide forms a porous metal shell that allows reduction to proceed ( V m / V o ≪1), or nonporous one that causes it to cease ( V m / V o ≥1; see picture). In the case of TiO 2 ( V m / V o ≈1), this barrier to reduction to Ti can be circumvented by recyclable use of NH 4 HCO 3 as a fugitive porogenic agent.

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