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Conventional fuel cells using noble metals as anode catalysts often suffer performance degradation due to CO poisoning and a host of problems associated with CO<jats:sub>2<\/jats:sub> production. This study provides a CO<jats:sub>2<\/jats:sub>\u2010emission\u2010free direct formaldehyde fuel cell. It enables a flow of electricity while producing H<jats:sub>2<\/jats:sub> and valuable formate. Unlike conventional carbon\u2010based molecules electrooxidation, formaldehyde 1\u2010electron oxidation is performed on the Cu anode with high selectivity, thus generating formate and H<jats:sub>2<\/jats:sub> without undergoing CO<jats:sub>2<\/jats:sub> pathway. In addition, the fuel cell produces 0.62\u2005Nm<jats:sup>3<\/jats:sup> H<jats:sub>2<\/jats:sub> and 53\u2005mol formate per 1\u2005kWh of electricity generated, with an open circuit voltage of up to 1\u2005V and a peak power density of 350\u2005mW\u2009cm<jats:sup>\u22122<\/jats:sup>. 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