Metal-organic frameworks (MOFs) and MOF-derived nanostructures are recently emerging as promising catalysts for electrocatalysis applications. Herein, 2D MOFs nanosheets decorated with Fe-MOF nanoparticles are synthesized and evaluated as the catalysts for water oxidation catalysis in alkaline medium. A dramatic enhancement of the catalytic activity is demonstrated by introduction of electrochemically inert Fe-MOF nanoparticles onto active 2D MOFs nanosheets. In the case of active Ni-MOF nanosheets (Ni-MOF@Fe-MOF), the overpotential is 265 mV to reach a current density of 10 mA cm −2 in 1 m KOH, which is lowered by ≈100 mV after hybridization due to the 2D nanosheet morphology and the synergistic effect between Ni active centers and Fe species. Similar performance improvement is also successfully demonstrated in the active NiCo-MOF nanosheets. More importantly, the real catalytic active species in the hybrid Ni-MOF@Fe-MOF catalyst are unraveled. It is found that, NiO nanograins (≈5 nm) are formed in situ during oxygen evolution reaction (OER) process and act as OER active centers as well as building blocks of the porous nanosheet catalysts. These findings provide new insights into understanding MOF-based catalysts for water oxidation catalysis, and also shed light on designing highly efficient MOF-derived nanostructures for electrocatalysis.

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Background Radiotherapy may lead to side-effects undermining patients’ quality of life (QOL). While mind-body practices such as qigong appear to improve QOL in cancer survivors, little is known about benefits for patients undergoing radiotherapy. Thus, this RCT examined the efficacy of a qigong intervention on QOL in women with breast cancer during and after treatment. Methods Ninety-six women with breast cancer were recruited from a cancer center in Shanghai, China, and randomized to the qigong (N=49) or waitlist control (N=47) group. Women in the qigong group attended 5 weekly classes over 5–6 weeks of radiotherapy. QOL outcomes (i.e., depressive symptoms, fatigue, sleep disturbance, and overall QOL) and cortisol slopes were assessed at baseline, during and at the end of treatment, and 1 and 3 months later. Results The mean age of the women was 46 years (range 25–64); stage 0 (7%) stage I (25%), stage II (40%) and stage III (28%); with over half (54%) having undergone mastectomy surgery. Multilevel analyses revealed that women in the qigong group reported less depressive symptoms over time than in the control group (P=.05). Women with elevated depressive symptoms at radiotherapy onset reported less fatigue (P<.01) and better overall QOL (P<.05) in the qigong compared to the control group. Findings were clinically significant. No significant differences were found for sleep disturbance and cortisol slopes. Conclusion Qigong may have therapeutic effects in the management of QOL in women receiving radiotherapy for breast cancer. Benefits were particularly evident for patients with pre-intervention elevated levels of depressive symptoms.

In recent years, global warming has become a widespread well-publicized issue. As the general public have become aware of the importance of protecting the environment, consumers have started to evidence a marked preference for green products. This study constructed a model describing the relationships among perceived benefit of green consumption behavior, perceived risk, moral responsibility, normative belief, control strength, control belief, attitude, subjective norms, behavior control, behavior intention, and actual behavior.

Highly active and durable electrocatalysts for the oxygen evolution reaction (OER) is greatly desired. Iridium oxide/graphitic carbon nitride (IrO 2 /GCN) heterostructures are designed with low-coordinate IrO 2 nanoparticles (NPs) confined on superhydrophilic highly stable GCN nanosheets for efficient acidic OER. The GCN nanosheets not only ensure the homogeneous distribution and confinement of IrO 2 NPs but also endows the heterostructured catalyst system with asuperhydrophilic surface,w hichc an maximizet he exposure of active sites and promotes mass diffusion. The coordination number of Ir atoms is decreased owing to the strong interaction between IrO 2 and GCN,leading to lattice strain and increment of electron density around Ir sites and hence modulating the attachment between the catalyst and reaction intermediates. The optimizedIrO 2 /GCN heterostructure delivers not only by far the highest mass activity among the reported IrO 2 -based catalysts but also decent durability. Figure 5. a) LSV curves of the water splitting devices at ascan rate of 5mVs À1 .b )Chronoamperometric measurementoft he 40-IG jjPt-C full cell at 1.6 V. Angewandte Chemie Communications 12543