A nanoscale observation to explain the discrepancy of electron exchange capacities between biochar containing comparable surface redox-active moieties
- Resource Type
- article
- Authors
- Shasha Li; Liming Shao; Hua Zhang; Xuemin Lu; Fan Lü; Pinjing He
- Source
- Biochar, Vol 4, Iss 1, Pp 1-15 (2022)
- Subject
- Biochar
Pyrogenic chars
Redox property
Electron exchange capacity
C-AFM
Environmental sciences
GE1-350
Agriculture
- Language
- English
- ISSN
- 2524-7972
2524-7867
Highlights The microscopic distribution of RAMs on biochar was achieved by combining C-AFM and a mediated electrochemical method. The uneven distribution of RAMs enabled biochar to possess outstanding EEC by enhancing accessibility. The removal of submicron particles that only occupied 1-4‰wt reduced EDC to 72% for st700 and 53% for ind400. The removal of submicron particles changed the EAC of st700 to 87% and ind400 to 1.40 times as raw chars. Condensed aromatic structures were indispensable to EAC, while both heteroatoms and amorphous aromatics contributed to EDC.