The authors regret the following errors in the published article: In the abstract (page 12744), the term gas chromatography-mass spectrometer should instead have read gas chromatography spectrometer . On page 12745, in the sentence beginning The corresponding mechanisms. , the term gas chromatography mass spectrometry (GC-MS) should instead have read gas chromatography spectrometer (GC) . The unit μmol was used erroneously throughout; all 20 instances of this term in the text should instead have read μmol. Moreover, on page 12750, in the sentence beginning As for CH4 production. , the text 1905.1 gcatalyst-1 should instead have read 1905.1 μmol gcatalyst-1.