This cover was designed by Yongxiang Liang for an article published in Nano Lett. (Volume 21, issue 20, August 19, 2021). The cover is an artist’s depiction of a novel molecular modification strategy presented for efficient CO₂ electroreduction by encapsulating palladium nanoparticles into metal?organic frameworks with 2,2′-bipyridine ligands. The catalysts achieve high CO faradaic efficiency over wide potential windows via optimizing the binding of key intermediates based on the electronic interaction between the palladium surface and 2,2′-bipyridine.

This cover was designed by Hongliang Li and Jiankang Zhao for an article published in Acc. Chem. Res. (Volume 54, Issue 6. March 16, 2021). On the cover, the two hands represents the sites which adsorb oxygen atoms in CO₂. Such adsorption configuration benefits bending the linear CO₂ molecule. The halo surrounding the hands represents charge density gradients which can polarize non-polar CO₂ molecules.

This frontispiece was designed by Laihao Luo for an article published in Angew. Chem. Int. Ed. (Volume 59, Issue 34. August 17, 2020). There are two bowling alleys with different patterns. The left rough alley represents the surface of disordered fcc-PdFe nanocrystals. The right smooth alley represents the surface of ordered fct-PdFe alloy. The bowling pins represent CO₂ molecules. The hit of the bowl balls on the pins indicates the successful conversion of CO₂ into CH₄. Our work demonstrated that on disordered fcc-PdFe nanocrystals, surface Fe species were irreversibly oxidized during CO₂ methanation, resulting in the variation of reaction path and decreased stability. This phenomenon is reflected by the surface roughness of the left alley and the tortuous trajectory of the bowl ball. In contrast, the ordered fct-PdFe nanocrystals ensured renewable metallic Fe species and maintained reaction pathway during CO₂ methanation, resulting in high stability. This phenomenon is reflected by the smooth surface of the right alley. The ball goes straight towards the bawling pin with a fast and straight manner.

This cover was designed by Yongzhi Zhong, Xiangdong Kong and Zhigang Geng for an article published in ChemPhysChem (Volume 21, Issue 18. July 28, 2020). It shows the catalytic process of CO₂ electroreduction over phthalocyanine (Pc) coordinated Co sites. Co sites were firstly linked by oxygen species on carbon black, enabling fast electrons transfer. The anchoring of Pc with Co sites further promoted the catalytic activity of CO₂ electroreduction into CO.

This back cover was designed by Han Liu, Yan Liu, and Qiuyao Li for an article published in Adv. Mater. (Volume 32, Issue 24. June 16, 2020). The cover is an artist’s depiction of efficient N₂ electroreduction to ammonia by F‐doped porous carbon framework catalysts. F atoms (yellow spheres) bonding to carbon atoms (grey spheres) create Lewis acid sites to enhance the repulsive interaction with protons for suppressing H₂ evolution, thus enhancing the selectivity of N₂ electroreduction into NH₃ (purple represents for N and pink represents for H).

This cover was designed by Xiaowei Gao and Chunyan Shang for an article published in Adv. Mater. (Volume 31, Issue 6. February 8, 2019). The cover is a family of pyrochlore oxides R₂Ir₂O₇ (R = rare earth ions) as acidic oxygen-evolving catalysts with superior specific activities. For R₂Ir₂O₇, the lattice expansion with R ionic radius (the blue sphere) is generally attributed to the increase in Ir–O–Ir bond angle via chemical pressure effect, which is thought to be responsible for the high OER activity.

This inside cover was designed by Guoyan Wang and Yanbing Ma for a Progress Report published in Adv. Sci. (Volume 6, Issue 3. February 6, 2019). The cover is an artist's depiction of single-atom catalysts. The curved surface represents the MoS₂ surface decorated with different types of Pt single atoms.

This frontispiece was designed by Lei Chen and Yan Liu for an article published in Adv. Mater. (Volume 30, Issue 40. October 4, 2018). The cover is an artist’s depiction of efficient N₂ electrochemical reduction to ammonia by Ru single-atom catalysts. The wine red sphere (Ru atoms) was uniformly distributed on nitrogen-doped carbon (blue represents for N and gray represents for C). With the help of electricity, the nitrogen was successfully reduced into ammonia (white represents for H).

This cover was designed by Guoyan Wang and Yanbing Ma for an article published in Nature Nanotechnol. (Volume 13, Issue 5. May, 2018). The cover is an artist's depiction of CO₂ hydrogenation to methanol via synergy between neighbouring Pt monomers. The curved surface represents the MoS₂ surface decorated with different types of neighbouring Pt monomer. The yellow sphere (S atom) between neighbouring white spheres (Pt atoms) is shining, as a reflection of a synergetic interaction.

This cover was designed by Yilun Ding for an article published in Angew. Chem. Int. Ed. (Volume 56, Issue 17. April 18, 2017). It shows the dependence of hydrogen production on metal-insulator phase transition, where the red fish as a representative of metallic support exhales more hydrogen bubbles than the dark one for insulator. The catalytic performance in ammonia borane hydrolysis was directly correlated with the highest occupied state of Rh single atoms, which was determined by the band structure of supports.